Black is back!!!
Billet Valve Cover/Roller Rocker Spacer Kit(Raw or Black out)
This is the most advanced and complete Billet Valve Cover/Roller Rocker Spacer to date. This spacer kit has a proprietary designed doweled/interlocking system to keep everything aligned for proper fitment, sealing and to squeeze in those big 1.6 or 1.7 Adjustable Roller Rocker Arms. This kit is designed retain the factory valve cover and its excellent breather/baffling system which most aftermarket covers DO NOT HAVE. Items included in this kit are the following: 5/8" Billet valve cover spacer(96-06 style valve cover), locating receiver dowels(96-06 12pt head bolts suggested not required), two black usable locating rubber valve cover gaskets, valve cover perimeter grommets, valve cover breather and PCV fittings w/grommets, Stainless Steel button head perimeter bolts or Stainless Studs w/Nylock nuts and AN washers to finish off everything so there's no rusty crusty looking mess down the road. Your choices will be "Raw or Black Out"
Jeep 4.0 Valve Cover Perimeter Grommet 7075 Billet Retainer Set(15 piece Raw or Black Out).
Jeep made a great simple sheet metal valve cover design that does exactly what it is supposed to do which is: Not leak, Control oil splatter, Proper PCV control without excess oil consumption and acceptable looks. Mopar stopped making these retainers over 10 years ago so we answered another call and made them look even better! Our new 7075 Aircraft Aluminum Retainers are super lightweight, fit even better than factory and can be polished to a mirror finish or choose the Black Out version. These will work directly with our valve cover spacer/stud/bolt kit and our billet thermostat housing to clear that added height. ***Note*** This set will include (15) Machined Billet Retainers in your choice of "Raw or Black Out"
Jeep AMC 4.0 4.2 Revised Billet Aluminum Thermostat Housing 1971-2006
Is it time for a new thermostat housing due to pitting, breakage, leaks, maybe after you add that new valve cover or spacer kit for those new roller rocker arms and now the thermostat housing hits or you just want the best damn housing on the market period then this one is for you. We have totally redesigned the AMC Jeep thermostat housing correctly with corrected outlet angles and solid billet aluminum construction that fits all years 1971-2006. We offer this housing in Raw or Black Anodized.
American Racing Jeep 4.0 Headers
Finally a great solution for the dreaded Jeep 4.0 cracked exhaust headers. Not only that but they pack a big(1-5/8" or 1-3/4") with a long seamless primary tube with a rotational firing order that converges into a stretched out 6 in to 1 merge collector for that big deep sound that produces great overall power and DOES NOT CRACK. American Racing Headers feels so confident that they back it by a lifetime warranty.
If you combine this header with our Copper gasket and Stainless steel bolt and winged washer kit you will have a great looking and performing setup for the life of your 4.0.
If you are wanting a chance to get your hands on these headers first we have created this page for PRE-ORDERS ONLY to get a jump start for our customers. ARH is moving to our area currently, once the move is complete they will start filling orders and we want to be one of the first to get these out to everyone.
We have never taken pre-orders before but this is an exception. If you place your order with us and decide to option the Copper gasket and bolt kit we will immediately send out those items. As soon as your header is built we will also send them out immediately. We will also be waiving the header shipping fees, you will only be charged shipping on our normal online items.
Once your order is placed there will be no cancellations, I repeat you can not cancel your order once it has been placed due to pre-ordering.
Newcomer Racing Micro-polished 4.0/4.2 Cam and Lifter Kits Fits: 199/232/242/258 1964-2006
Newcomer Racing Cams come in many different custom grinds to suit your specific needs. We've ran every single one of these grinds and many more over the years to find the best of the best. We decided put together a list of our favorite cam grinds and offer them to the public. Picking your favorite cam can sometimes be a daunting process so we have added descriptions to each cam profile to help aid in your decision. Basic things to consider when choosing your cam:
- RPM range and where you want your powerband.
- Application(Daily Driver/Off-road/Racing/Multi-purpose)
- Weight
- Transmission(Manual or Auto)
- Gearing
- Engine Size
- Compression
- Induction/Exhaust(Stock or Modified)
- Exhaust Tone vs Engine Smoothness at idle.
***All of our AMC/Jeep cams are Hydraulic Flat Tappet(HFT) or Mechanical Flat Tappet(MFT), "Roller IS NOT AN OPTION". Lifter options are Hydraulic/Mechanical/Mechanical w/EDM hole. Our cam grind part numbers will indicate the recommended lifter style although you can run a mechanical/EDM lifter on any of our cams. Some of our smaller grinds are No Springs Required(NSR) which means you can run your stock springs but always check for coil bind. Stock spring specs are normally around 50-60lbs on the seat and 220 range open and good for around .460" lift. For an upgrade spring rates you will need to target 90-115 seat and 270-300 open pressures. All of our cam spec numbers are based on a stock 1.6 rocker ratio, if you go to an upgraded 1.7 rocker ratio this will inherently raise your total lift values so be aware when choosing your springs. All cams and lifters are thoroughly inspected, cam journals are micro-polished, cleaned, oiled and ready for installation with assembly lube. You have the option to choose your brand of Billet timing set between JP Performance or Rollmaster. Another choice is a new spring loaded cam bolt, washer, spring and pin kit(Required on early 199/232/258 and 99 and newer thrust style blocks to properly retro-fit). On any of our cam kits or anyone else's for that matter do yourself a favor and degree your cam, this will save you dividends in the end trust us! Every single stock motor can benefit greatly from just a proper custom computer tune, we have done it so we recommend custom tuning to maximize all that work and money invested to increase your usable power. When other companies say no tuning required to get your sale don't believe it, yes it will run but no it will not be nearly as effective. From the smallest cam to the biggest the more you do to enhance the efficiency from induction, exhaust or the rotating assembly on your setup the better it will perform. This multiples and becomes more important as you go up in cam size. Below are cam descriptions to help your decision making process:
- NR-120-HFT-NSR(207/211 112 .459"/.461") Powerband Idle-5,200rpm's with a deep smooth idle quality, great stock cam replacement upgrade that works with a stock stall converter and all stock components that can make great small quick spooling turbo or supercharger cam. "Mr. Smooth"
- NR-121-HFT-NSR(212/216 110 .460"/.460") Powerband 1,200-5,500rpm's with a noticeable deep idle quality, the most aggressive cam we recommend using with stock springs. Works well with all stock vehicle components, with upgrades just keeps showing gains. "300HP"
- NR-122-HFT (213/217 112 .480"/.494") Powerband 1,300-5,600rpm's with a noticeable deep idle quality, this is the first step up the ladder that requires a spring with more lift capabilities. This makes a great entry level cam combo with our competition head for those who want to utilize added lift, with our 1.7 roller rockers you will net .510"/.525", works with stock stall converter. "Lightning".
- NR-123-HFT (214/211 114 .478"/.461") Powerband 1,200-5,400rpm's this is the weird cam profile of the bunch but don't let that fool you this little guy works awesome with a wide power band. This profile works well on any application and gives plenty of intake cylinder filling with the added duration. Stock short block or lower compression for low octane usage this is your cam. Works well with stock stall, increased lift springs required. "Odd Ball"
- NR-124-HFT (214/214 113 .478"/.478") Powerband 1,200-5,600rpm's this little guy is a great all around cam for naturally aspirated or forced induction combos. We have tested this one extensively in the "Mutt" 4.0 motor on the engine dyno(326hp/343tq on boost 550whp/600whp), on street, towing and racing. At a stock idle this cam will have a slight deep lope, increased spring rate and added clearance required. Works with stock stall converter. "Mutt"
- NR-125-HFT (218/224 112 .494"/.504") Powerband 1,500-5,900rpm's this one will have a slight aggressive lope at stock idle. Now your starting to get up in the cam area where induction and exhaust upgrades will start to become options to utilize the benefits of this cam. We have ran this cam profile for 15+ years and made killer power numbers in daily drivers to all out race rigs. This is a great starter in the aggressive cams yet yields great driving manners and yet you can twist that tach to 6,000 rpm's. We recommend both HFT and MFT lifters depending on your application. We machine our blocks for direct cam oiling for HFT and MFT setups. If you want to utilize direct cam oiling on your stock blocks and have adjustable roller rockers then you can select the MFT-EDM lifter with a direct feed hole to help with wear and higher rpm control issues. Still works with a stock stall but with a 2,000-2,400 stall you will benefit. "Old Faithful"
- NR-126-HFT (220/226 112 .528"/.536") Powerband 1,600-6,200rpm's now we are getting somewhere. This cam needs head, induction and exhaust upgrades to serve it well with more compression or forced induction this thing rips. We have made well over 400+hp with this cam with a built stroker. You can run a HFT but we recommend a MFT-EDM lifter to avoid wear and upper rpm control. This one lopes without a doubt and with a 1.7 rocker it pumps out .561"/.570" lift. "Bump and Grind"
- NR-127-HFT (226/232 110 .520"/.568") Powerband 2,000-6,200rpm's if you want to get noticed or hated this is your cam. With surprisingly great driving manners this cam with turn heads at the stop light with a healthy lopey idle quality. You can still run a HFT but we recommend MFT-EDM for longevity and upper rpm valve train control. This one will need all the induction upgrades along with a 2,500 stall, manuals let it rip! With a 1.7 roller rocker this one pumps out .552"/.604" lift so have your build with induction and exhaust upgrades on point and raise that idle to 750rpm's. "350HP"
- NR-128-HFT (228/228 113 .509"/.509") Powerband 1,800-6,200rpm's this mid sized powerhouse single pattern cam will make some noise, the good kind. An all around great performance cam for NA and boosted applications. Get your build on point to reap the benefits or simply throw the boost at it for an aggressive daily driver and set that idle to 750rpm's. "Boosted"
- NR-129-MFT (236/244 110 .540"/.563") Powerband 2,400-6,400rpm's now business is picking up. This can be a street/race cam with a very healthy lopey idle, no mistaking this bad boy is made to be seen. Stock idle will need to be raised to at least 800rpm's for a nice crisp pop out the tail pipe. With a 1.7 roller rocker this one hits .574"/.598" on lift, 2,600-3,000 stall required. "Street Terror"
- NR-130-MFT (244/252 108 .544"/.544") Powerband 2,800-6,600rpm's talk about a noise maker this one fits the bill, straight up race or hard core street machine if you dare. If you have never heard a built inline with a nasty cam trust us they sound amazing, similar to a BBC if using a 6 to 1 header. This one is made for naturally aspirated applications where compression will be your friend. 3,000 stall required or sticks grab a good clutch and give it hell. "McNasty"
- NR-131-MFT (264/272 106 .594"/.598") Powerband 3,400-7,200rpm's all out race only here unless you want to be a total badass on the street. This one needs compression, flow and some great parts so this thing can spin to 7,000+rpm's. An AMC/Jeep motor changes tones around 6,000 rpm's, the kinda tone that makes the hair stand up on your neck. Well this one goes way past that point so hold on to your seat. With all the supporting mods this cam will make 500hp NA and make people cringe at the wicked snap crackle pop sound. Make sure you run a fully counter weighted crank at these rpm's where structural stability and balancing are key. "Widow Maker"
AMC JEEP 4.0 4.2 1.7 Ratio Fixed "Non-Adjustable" Light Weight Roller Rocker Arm Kit
If you want dyno proven hp & tq gains then here's one of the easiest ways to add 10hp/15ftlbs. This is our new lightweight yet heavy duty 1.70 ratio Fixed "Non-Adjustable" roller rocker arm kit These are 100% made in the USA and feature a heavy duty fully rollerized fulcrum and over-sized roller tip. ****For "Non-Adjustable" rocker arms a valve cover spacer is not required, they fit in place of the stock rocker arms under the stock valve cover. Utilize the stock pushrods with these "Non-Adjustable" rocker arms.
AMC JEEP 4.0 4.2 1.7 Ratio "Adjustable" Light Weight Roller Rocker Arm Kit
If you want dyno proven hp & tq gains then here's one of the easiest ways to add 10hp/15ftlbs. This is our new lightweight yet heavy duty 1.70 ratio adjustable roller rocker arm kit These are 100% made in the USA and feature a heavy duty fully rollerized fulcrum and roller tip. *3/8" .080" wall pushrods can only be used only on our competition heads unless you clearance your head accordingly. On most roller rocker arm kits and especially on adjustable kits you will have to space the valve cover up at least 1/2' for clearance from the added height of the over-sized rocker arms. We offer one of the best solutions for this issue with our 5/8" Billet Valve Cover Spacer Kit which is also listed on our site.
2023 starts with online engine ordering reopened!!!
Clifford 4.0 4.2 Jeep AMC Holley 650cfm Blow-through System
This setup is from our first magazine cover build. It has been sitting this entire time(6 years), includes: Fully ported and polished Clifford 4.0 or 4.2 intake manifold with the four hole adapter(Intake pattern has been corrected), 650 Holley XP "Blow-through" with pressure tubes, Aeromotive regulator 1:1 for carb, #8 AN plumbing, extremely hard to find low rise carb hat that works, MSD Pro-billet distributor with wires. All of these items have only the original dyno time. On a mild cammed stroker this setup on 17psi made well over 650HP/700TQ with no fueling issues and great driveability.
Smedling 66mm T4 Turbo Gas/Diesel
This is a low mileage turbo that has zero issues besides needing a good polish. This 66mm turbo can be used on common diesels such as: Cummins/Powerstroke/Duramax or anything from 3.0L-6.0L gas. These turbos typically support around 800hp on gas or 600hp diesel.
Stainless Steel HD Engine Lift Bracket w/SS Clevis and 16"x 3/8" drop chains
This is our in house designed engine lift bracket for those big, long, heavy engines that need the strength and the length but not to scratch up your new or old motor. We use these on everything and they work great for any platform from an Inline four, monster Cummins or Big block V8's. They are made from 1/2" 304 Stainless Steel with SS Clevis's, 3/8' chains and multiple hook placements(Center works best, normally).
Jeep AMC 4.0 4.2 Revised Billet Aluminum Thermostat Housing 1971-2006
Is it time for a new thermostat housing due to pitting, breakage, leaks, maybe after you add that new valve cover or spacer kit for those new roller rocker arms and now the thermostat housing hits or you just want the best damn housing on the market period then this one is for you. We have totally redesigned the AMC Jeep thermostat housing correctly with corrected outlet angles and solid billet aluminum construction that fits all years 1971-2006. We offer this housing in Raw or Black Anodized.
Jeep AMC 4.2 258 Stroker Long Snout "Black Anodized Billet Crank Spacer"
If you are running an early 258 (4.2) non-serpentine crank for your Stroker you will need to either cut the crank snout or simply run one of our new "Black Anodized Billet Crank Spacers". These are designed to work with stock and aftermarket harmonic balancers, reuse your stock "Thick" crank washer and make sure your stock bolt has enough thread engagement. ***Attention, the O.D(Outer Diameter) was based off a neutral size so they would fit most all balancers though some balancers will be tighter than others due to inconsistences of manufactures.
Jeep 4.0 Valve Cover Perimeter Grommet 7075 Billet Retainer Set(15 piece Raw or Black Out).
Jeep made a great simple sheet metal valve cover design that does exactly what it is supposed to do which is: Not leak, Control oil splatter, Proper PCV control without excess oil consumption and acceptable looks. Mopar stopped making these retainers over 10 years ago so we answered another call and made them look even better! Our new 7075 Aircraft Aluminum Retainers are super lightweight, fit even better than factory and can be polished to a mirror finish or choose the Black Out version. These will work directly with our valve cover spacer/stud/bolt kit and our billet thermostat housing to clear that added height. ***Note*** This set will include (15) Machined Billet Retainers in your choice of "Raw or Black Out"
"HIGH OCTANE" Jeep 4.6 Stroker Engine Package
For those who want the stoutest most reliable street Jeep stroker available on the market that still retains factory manners and dependability as long as you don't mind running premium octane fuel hence the name "HIGH OCTANE" then this one fits the bill. We have done our research and developed an elite engine package that utilizes our custom made hypereutectic pistons and lightweight rings with the highly desired 6.125" (Long)rods, 10.5:1 compression with our newest designed competition head for this piston design. You may ask why Hypereutectic pistons and not forged? For a naturally aspirated engine that see's daily driving and hot rodding in all types of weather you can not beat a well designed Hypereutectic for quiet operation, excellent long life, anti-scuffing and sealing ability. To this point there has not been a hypereutectic option with a 6.125"(Long) rod option so we made one and created a new animal. From the factory the original 4.2(258) started life around 100hp to eventually topping out around 190hp by the 4.0(242). "HIGH OCTANE" at 4.6 liters is another animal all together, on our dyno this package pumped out 366hp and 373ftlbs of torque with one of our less aggressive cams. With this package we can custom tailor the cam to suite your needs and bring the power in where you want it. This package will have all of our goodies such as: 1.7 adjustable roller rockers, 3/8" pushrods, billet valve cover spacer kit w/billet valve cover perimeter retainers, billet thermostat housing, ATI serpentine damper kit, slicked out paint color of your choice, intake block-off plate, water pump, copper intake/exhaust manifold gasket, stainless steel winged washer kit, 24lb injectors. Recommendations: Intake/Intake/Intake did we say Intake, to totally utilize this package we recommend an extremely ported stock intake manifold or custom setup(Sheetmetal) with an oversized throttle body(These are not mandatory items just recommended), header with 3" collector and a custom tune is MANDATORY with 91 octane minimum. Manual transmissions require clutch upgrade such as Mcleod or Centerforce. Automatic transmissions say a prayer then prepare for a moment of silence unless built or shift kit(Except AW4's, if they are healthy they seem to hold up well).
***BUNDLE PACKAGE*** Extreme Duty Copper Intake/Header Gasket & 500"(1/2") Stainless Steel Winged Washer kit.
We heard your request so we added a BUNDLE PACKAGE for our very popular "Copper intake/exhaust gasket" and "Stainless Steel Winged Washer/ARP bolt kit". With this option you will save $7.00 off the total of both items and only shipping costs will be applied for one item, typical savings average around $31.00 when bundled.
Billet Valve Cover/Roller Rocker Spacer Kit(Raw or Black out)
This is the most advanced and complete Billet Valve Cover/Roller Rocker Spacer to date. This spacer kit has a proprietary designed doweled/interlocking system to keep everything aligned for proper fitment, sealing and to squeeze in those big 1.6 or 1.7 Adjustable Roller Rocker Arms. This kit is designed retain the factory valve cover and its excellent breather/baffling system which most aftermarket covers DO NOT HAVE. Items included in this kit are the following: 5/8" Billet valve cover spacer(96-06 style valve cover), locating receiver dowels(96-06 12pt head bolts suggested not required), two black usable locating rubber valve cover gaskets, valve cover perimeter grommets, valve cover breather and PCV fittings w/grommets, Stainless Steel button head perimeter bolts or Stainless Studs w/Nylock nuts and AN washers to finish off everything so there's no rusty crusty looking mess down the road. Your choices will be "Raw or Black Out"
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https://www.enginelabs.com/news/video-building-the-worlds-most-powerful-jeep-inline-6-engine/
https://www.roadandtrack.com/news/a34345852/861-hp-jeep-straight-six-dyno-video/
https://www.thedrive.com/news/36982/tuner-pushes-the-legendary-jeep-4-0-liter-straight-six-all-the-way-to-861-hp
Stainless Steel Intake/Exhaust Flange Winged and Round Pinch Washer kit w/ARP 12pt Stainless Steel bolts.
We tried to answer the call for intake and header flange fitment issues with an alternative solution that looks much cleaner and never rusts. This newly designed Winged Polished Stainless Steel washer can be rotated to fit multiple locations or reach the intake casting that the factory round washer could not quite reach before and has enough bore clearance to allow the washer to articulate on uneven surfaces. This kit will feature (8)Winged, (3)Round-for exhaust ends/center and (11)ARP 12pt polished SS bolts.
Newcomer Racing "Power to Move" 100% Soft Cotton T-shirts "Crazy Turbo Stroker Jeep Rat Rod"
Custom T-shirts available in BLACK, HEATHERED and BOLD BLUE and sizes from Small through XXL. These are all available and in stock.
Newcomer racing hats
We have two styles of hats: Solid Black and Black/White Trucker style. Both offered with a universal one size fits all adjustable.
Extreme Duty Lifetime .060" Annealed Copper Intake/Header Gasket
This all new custom designed Newcomer Racing exclusive "Copper" Intake/Header gasket answers the call for many issues related to the 4.0 based Jeep head. First off we list this as a lifetime gasket that can be reused time and time again with just a simple gasket cleaning and reapplication of the provided High Temp Silicone. Secondly it does not have to be trimmed like all stock gaskets to fit the stock or highly ported versions and it serves as a great porting template for our in house port designs. We offer three designs to fit your needs: Stock(87-99)/Edelbrock, TUPY(99-06), then our updated True round port design for our 1/2" Stainless Steel Custom Header flanges for your custom header builds. Simply choose your head style at the checkout. Our Stainless Steel ARP fastener/Winged Washer kit compliments these gaskets well! As noted this wrapped gasket will come in an indestructo box with a full tube of high temp silicone for many uses if needed.