Jeep 4.0 Cylinder Head Full Port and Polish Only(Cast iron).
For anyone wanting their cylinder head fully ported and polished this service will include gasket matching to a certain gasket or dimension size on the intake and exhaust ports. We will open up the runners both intake and exhaust with a smooth transition into the seat area. All chambers will be deshouded and balanced with either an open or closed chamber design. ***Upgrades and suggestions will include: Competition valve job(5 angle/Radius), Push rod through hole enlargement (3/8" oversized pushrods and or increased rocker ratio), LS conversion which includes: hone guides to size w/valve spring seat/seal area machining for increased lift and .500" Viton seals.
The "300HP" 4.6/4.7 Jeep/AMC "Stroker" inline 6 cyl engine package.
The "300HP" is our entry level engine package and they normally make between 290-320hp/320-340tq with an excellent power band from idle to redline. All of our engine packages are custom hand built to spec, work well both Fuel injected or Carbureted. These engines are all upgradable with additional available options from below.***Recommendations for upgrades- Walbro 255 fuel pump, 24-36lb injectors, upgraded header w/2.5" collector and exhaust minimum!, intake porting, bigger throttle body, upgraded radiator, upgraded motor mounts(Drivers side mount that bolts on the block MUST have increased bolt count over the factory three bolts to keep from breaking block from added power, passenger can stay stock), cold air intake and last once everything is upgraded have it properly custom tuned then everything and everyone is happy. Every motor is dynoed with a video and power numbers,12 month/12,000 mile warranty and complimentary Newcomer racing T or Sweat shirt w/hat. All engines will be shipped bare unless our custom high quality monotone paint option is applied from the options list.
.500"(1/2") 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 1/2" 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.
The "350HP" is the next step up the ladder to more performance out of your 4.0 based Jeep/AMC motor. This combo features a more aggressive cam profile to give that "Lopey/Rowdy" idle quality with a redline of 6,000 rpm's.
The "350HP" features the following upgrades from its "300HP" counter part: Baffled oil pan Competition cylinder head, Full roller 1.7 adjustable rockers(Newcomer) w/required Billet valve cover spacer kit, HD 3/8" .080" wall custom length pushrods, and a more aggressive cam profile to give a really strong mid range and top end all the way to 6,000rpm's without sacrificing to much bottom end power. ***Recommendations for upgrades- Walbro 255 fuel pump, 24-36lb injectors, upgraded header w/2.5" collector and exhaust minimum!, intake porting, bigger throttle body, upgraded radiator, upgraded motor mounts(Drivers side mount that bolts on the block MUST have increased bolt count over the factory three bolts to keep from breaking block from added power, passenger can stay stock), cold air intake and last once everything is upgraded have it properly custom tuned then everything and everyone is happy. Every motor is dynoed with a video and power numbers, 12 month/12,000 mile warranty and complimentary Newcomer racing T or Sweat shirt w/hat. All engines will be shipped bare unless paint our custom high quality monotone paint option is applied from the options list. ***As of 12/01/21 all "350HP's or anything turning over 5,500 rpm's will be required to get an ATI damper due to engine speed on the dyno for our and your safety.
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.
Jeep 4.0 LS Converted Competition Cylinder Head.***(Cancelled until further notice.***
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.
The "Torque Monster" for those who want it all without sacrificing any that bottom end grunt!
The "Torque Monster" has quickly became our best seller. It offers killer bottom end and midrange power with out killing the top end power thanks to our Competition Cylinder Head upgrade. When you still want great driveability and road manners with that all around awesome power band this is your build with a power band from Idle to 5500rpm's with a slightly noticeable idle. This package will include a lightweight crank for those quick revs, Resized short rods w/ARP bolts, main girdle, baffled oil pan, billet timing set, micro-polished custom cam and lifters, long lasting quiet hypereutectic pistons w/lightweight rings for low drag, long life performance, 9.7:1 compression set with proper quench set for a pump gas friendly combo, full 1.7 adjustable(Newcomer) roller rocker arm setup with custom HD pushrods, our custom valve cover spacer package with a factory valve cover for proper fit and evaporative functions. We spray every build with the customer chosen paint color or in stock colors. We recommend the following supporting mods: Intake manifold port match, Throttle body boring and taper porting, Header, 24lb injectors, Cold air intake, 2.5" minimum exhaust tubing, Upgraded Clutch(Mcleod/Centerforce), Automatic upgrades depending on style(Stock converters work well on all), Custom tuning(Even on stock vehicles there's always gains), We ONLY RECOMMEND "Flyin Ryan Tuning" or in house tunes on builds. These builds will include a 12 month/12,000 miles warranty, every single motor is dyno proven with a video and power numbers, a complimentary T or Sweat shirt w/hat. All engines will be shipped bare unless our custom high quality monotone paint option is applied from the options list. ***As of 12/01/21 any engine build turning over 5,500rpm's will be required to have an ATI damper due to engine speeds on the dyno for our safety and yours.
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.
Jeep AMC 4.0 4.2 Stroker (87-06) Direct Replacement ATI SFI Approved Harmonic Six Rib Serpentine Balancer Kit
We had to address our own issues and the Jeep/AMC community with the effects of upper rpm crank shaft harmonics and safety concerns with the only available options being factory replacement dampers. If you race or spin your 4.0 or 4.2 based Jeep/AMC engines above 5,000 rpm's then this kit should be on your wish list. The difference between a factory balancer and our ATI balancer on the dyno is totally night and day, silky smooth!!! The factory balancers tend to have a harmonic(vibration) or a pitch change starting sometimes as low as 5,000 rpm's. Our new billet hub and modified ATI balancer setup eliminates everything and we've twisted these to 7,000 rpm's without the thought of an issue and they are 2lbs lighter. You will also have the option to bolt on another front mounted pulley(Three bolts/ARP stainless 12pt) for that supercharger or added accessory with a common three bolt pulley pattern. Your kit will include: Pre assembled six rib serpentine balancer/damper with tapered flat head stainless bolts, (3)12pt Stainless ARP bolts(Added pulley option), black plated billet hub keyed and indexed to the factory zero timing mark(No more guessing on timing with 360 degrees of timing marks on the damper), Crank bolt(Reuse your factory thick washer), extreme pressure assembly lube, blue and red locktite with full assembly instructions. ***This listing is for SERPENTINE BALANCERS ONLY, not v-belt balancers.
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 4.0 1/2" Billet Aluminum Intake Flanges
Build your own intake or have one built with these precision laser cut 1/2" Billet intake manifold flanges for the 4.0 Jeep cylinder head. These flanges match our Copper gaskets, you can build your intake runners to mount flush on the flange or inside for a smaller port size. The tall flange provides multiple mounting points for the factory or aftermarket harness/NOS or random items depending on your layout. If you choose not to utilize the tall flange, build your intake completely before you mill the top off so your intake will stay in place during the welding process. ***Our Stainless steel header flange with this intake flange are made with a slight interference fit so you can clearance either one to fit your application best. This listing is for the "FLANGE ONLY", the intake in the pic is one of our in house intakes used as a reference for what can be accomplished.
"Blackout Series" 1.7 Ratio Adjustable Roller Rocker Arm Kit
This is our new "Blackout series" 1.7 adjustable roller rocker arm kit with dyno proven power gains. These are 100% made in the USA and feature a heavy duty fully rollerized fulcrum and roller tip. To utilize the 1.7 ratio you will need .100" shorter pushrods when compared to stock, we offer 5/16"(Stock head) and 3/8" *(For use only on our competition heads unless you clearance your head) diameter .080' wall hardened pushrods. 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.
Billet Valve Cover/Roller Rocker Spacer Kit
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.
Jeep 4.0 Cylinder Head 1/2" Alumium "Block-off Plate"
When you need to seal up an engine for storage, shipping, that backup race motor or built head thats finished but not quite ready to install then protect it with these Cylinder Head Block Plates. These are designed for any 4.0 Jeep Cylinder head including aftermarket versions.
Newcomer Racing Revised "True Round Port" & OEM Style "D Port" 1/2" 304 Stainless Steel Header Flange
We have both the upgraded OEM "D-port" style and the new revised round flanges. The revised header flange design is to be uses in conjunction with our matching "Newcomer" Copper Intake/Exhaust header/manifold gasket. We have redesigned the original Factory D-port into a true round port on all exhaust ports with a 1-3/4" slip in fit or 1-7/8" flush fit depending what primary tube size you prefer. We have purposely left material thick between the runners where the intake is seated, that being said you need to clean-up/grind the intake casting flaws to fit between the header flange properly. ***TIP***When fabricating your own header we suggest bolting the header flange down flat in as many places as possible on a head, welding everything up accordingly then check for straightness. DO NOT be scared of a curve in the flange(this is normal), once its all bolted down they will lay out great without leaks. We are kind of biased but we suggest our Stainless Steel Winged Washer Kit to finish off your custom build. Now go make something cool, send us the pics we want to see and share it!