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These extreme main cap sets consist of all 5 caps including the rear and front cap
These kits are specifically designed to deliver the performance you want
6" axle or GM 10-Bolt
This construction ensures superior strength
Manufactured with lightweight aluminum technology
Chevy BBC 454 6.385" 4.250" Bore 1.270" .990" Dome Top Forged Pistons These extreme main cap setsSpeedmaster Forged pistons are made from 4032 aluminum alloy for quieter operation and reduced piston to wall clearance. Up to 20% lighter than traditional forged pistons that eliminate harmful stress concentrations for superior strength. Specifically designed for naturally aspirated or moderate nitrous applications.
