Westech Performance dyno tests a 555-inch stroker Ford Performance big-block engine with 13:1 compression and twin Dominator carbs!

We test a variety of header sizes and types from Hooker on a 427ci big-block Chevy to show power trends and performance advantages. Tests include 1 ¾-inch long tube, 1 7/8-inch long tube, 2 ...

Related: Budget 350-Inch Small-Block Chevy Engine Rebuild and Dyno Test The Siamese bores are offered in a variety of sizes and come 0.005-inch undersized, requiring a hone job before assembly.