Chevy BBC 454 Gen 5 & 6 1991 - Up 1Pc RMS Rubber Oil Pan Gasket These MidAir Series Manifolds includes

These MidAir Series Manifolds includes a 4150 Series 1200 CFM Billet Throttle Body

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

It is effective at any rpm level or load

Compatible with Gas

Chevy BBC 454 Gen 5 & 6 1991 - Up 1Pc RMS Rubber Oil Pan Gasket These MidAir Series Manifolds includesSpeedmaster 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.