Chevy GM GEN III LS1 LS2 LS6 5/16" Guide Plates If your standard Bowtie block

If your standard Bowtie block could handle 1500+ HP it would be Speedmaster's H1 engine block

Perfect for replacing missing or damaged mounting caps

pulling trucks

This Speedmaster tailshaft housing are designed to fit the stock GM Powerglide transmissions and accept a TH400 yoke

let a Speedmaster aluminum Competition series radiator give your high-powered race car the advantage

Chevy GM GEN III LS1 LS2 LS6 5/16" Guide Plates If your standard Bowtie blockYou need guideplates to keep your pushrods from deflecting under high rpm conditions. That's just what our Speedmaster guideplate sets do, they are made from 5140 Chromoly steel, nitrided and black oxide coated for corrosion and wear resistance.