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The Cometic Street Pro GM Gen-6 L21/29 454 Big Block 4.375in Bore .040in Top End Gasket Kit - PRO1046T is a precision-engineered gasket kit with a 4.375" bore and .375" compressed thickness.
This Cometic complete gasket kit delivers a comprehensive, precision-matched set of seals and gaskets engineered to OE or better specifications. Each component is manufactured from materials specifically chosen for their temperature range, chemical resistance, and compressibility — ensuring every sealing surface in your engine is properly protected during rebuild or performance upgrades.
Verified fitment: Chevrolet C2500 (1996–2000); Chevrolet C2500 Suburban (1996–1999); Chevrolet C3500 (1996–2000); Chevrolet Express 3500 (1996–2000); Chevrolet G30 (1996); Chevrolet K2500 (1996–2000); Chevrolet K2500 Suburban (1996–1999); Chevrolet K3500 (1996–2000); and 10 more.
Free U.S. standard shipping on qualifying orders $199+. Special order and made-to-order items can't be cancelled or refunded once ordered.
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We carry 750,000+ parts, so we can probably still get it. Check the spelling, try the part number, or ask us.
Request this part Text us (833) 691-5717