Chevy BBC 454 Gen 5 & 6 1991 - Up 1Pc RMS Rubber Oil Pan Gasket Speedmaster lightweight crankshafts are perfect

Speedmaster lightweight crankshafts are perfect for engines wanting quicker rpm

The Speedmaster top plates allow air to enter smoothly through the top

Positive stop bushing areaArea for staking bushing (prevents bushing spin)Snap ring to prevent seal blow-outLube reliefs on outer gear pocketsBillet 4140 HTSR steel stator shaft will never spin-out

8" diameter ring gear and removable pinion support

Speedmaster ring and pinion preload spacer

Chevy BBC 454 Gen 5 & 6 1991 - Up 1Pc RMS Rubber Oil Pan Gasket Speedmaster lightweight crankshafts are perfectSpeedmaster gaskets are designed for today's performance engines, which can create excessive amounts of vacuum and pressure in the oil pan. They're constructed from a cellulose nitrile material that features excellent tensile strength and superior blowout resistance, and their latex coating conforms to minor sealing surface irregularities for a better seal.