Designed from the ground up!Performance Automatic developed a billet aluminum servo and cover employing permanent lip type seals to conform to various transmission case bores. Minimal transmission fluid is used in the 1-2 and 2-3 shift ensuring positive shifts, extending clutch and band life and greatly reduces 2-3 flare up. The 2 piece billet servo assembly, which will fit all trans shields, comes with an ''O'' ring seal in the cover and is constructed of 6061-T6 aluminum to eliminate warpage.