Enginetech BC409J Main Bearings Set for Chevrolet GM Gen III IV LS 4.8L 5.3L 5.7L 6.0L 6.2L EnginesGM LS GEN III IV main bearings set. Fits: 4. 8l, 5. 3l, 5. 7l, 6. 0l, 6. 2l

Advertised Exhaust Duration: 252

-Complete head gasket set w/ MLS head gaskets (rectangle intake ports)

While the LSXR™ features a 102mm air inlet that is perfectly suited to the FAST™ Big Mouth 102mm Throttle Body™

OEM Throttle Body Adaptor Plate - Part# 146029-KIT

Dual Valve Springs from COMP Cams® are manufactured from Super Clean™ wire and subject to extensive quality control testing to deliver a valve spring assembly with superior strength

Washer Included: Yes

000" Bore 63-68   Special high performance intake gaskets not included

These damper bolt kits from ARP will ensure that your balancer is locked into position

Washers Included: Yes

-Ideal for serious street performance &amp

125" h-beam rods with ARP 8740 bolts

Warranty Information