Jeep AMC 4.0 4.2 Revised Billet Aluminum Thermostat Housing 1971-1999
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. We offer this housing in Raw or Black Anodized. ***This housing only fits 1971-1999 4.0 and 4.2 engines, the 1999 and newer front drives may have a belt interference issue if your front drive has an idler pulley on the front side of the head. You can still use this housing but you will need to clearance the bottom area accordingly***
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" 1/2" 304 Stainless Steel Header Flange
This 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!