Casting number 862 and 706. These heads come on gmc and chevrolet trucks and suv's. This head is completely rebuilt. Featuring. 650 springs and 2. 00/1. 57 valves, our all. Webthis chevy gmc head is a new and improved casting; The cylinder head is either sold complete with all new parts or bare ; This is oem replacement quality at a fraction of the. They feature smaller valves and ports. Web — so in summary, 862 ls heads offer performance advantages of higher durability, better torque, and easier installation. The stock 243 heads are not a big. Weblooking to boost your chevy 5. 3l v8 engine's performance? Webwe have a few options you can purchase such as a pair of stage 1, stage 2, stage 3, or stage 4 ls 706/862 cathedral casting 5 axis cnc porting with stainless valves and wp. The 862 heads use an extra thick casting,. Smaller intake valves and intake port volume. Larger intake valves and intake port volume. When it comes to. I have a 99 5. 3 that's going in my 02 silverado that currently has a 4. 8 and the 5. 3 has 862 heads and i found a set of 799 heads on a 5. 3 in a savannah. Webpart 6 of the ls 5. 3l build will cover installation of the 862 aluminum heads, lifters, pushrods, and rocker arms.
