FEL-PRO Performance Gaskets provide a durable, leak-resistant seal on racing and special performance engines and are intended for use by the professional race engine builder or the serious amateur enthusiast who will settle for nothing less than the best. NASCAR, ALL PRO, ACT, WOO and ASA champions rely on FEL-PRO engineering for flawless performance under extreme conditions. PERFORMANCE GASKET Features: Perma-Torque / Blue Stripe and Printoseal Wire Ring Head Gaskets minimize torque loss. Blue Stripe Cork/Lam Steel Core Valve Cover Gaskets resist being blown out or drawn in under race conditions. Printoseal Intake Manifold Gaskets seal extra tight around the ports and resist soaking from gasoline, alcohol and oil. Steel Core Performance Exhaust Header Gaskets offer maximum blowout resistance and maintain header reversion effect for full engine power.Pit Stop USA offers Fel-Pro Rear Main Seal - SB Chevy - Special 2 Piece for Align Honed 400 2909 at low everyday prices. Be sure to check out all of our products from Fel-Pro Performance Gaskets including Fel-Pro Performance Gaskets Rear Main Seals - Small Block Chevy.