Header Gasket Set - SBC Stock-Port 1.355 x 1.485

The Header Gasket Set for Small Block Chevy (SBC) with stock-port design is the critical sealing component every serious engine builder reaches for when assembling or rebuilding a small-block Chevrolet. Whether you're running a carbureted street engine, a classic muscle car, or a vintage hot rod, header gaskets must withstand extreme cylinder-head temperatures and pressure cycles that would destroy inferior materials. This gasket set is engineered to seal the junction between your cast-iron or aluminum cylinder head and custom headers, preventing combustion gas blow-by that robs power and causes header leaks.

MAHLE ORIGINAL/CLEVITE is the OEM-trusted gasket manufacturer, and this MS19982 set features stock-port dimensions of 1.355 x 1.485 inches—the correct bore sizing for factory SBC cylinder heads and most performance variants. The gasket material resists thermal cycling, oil, fuel, and coolant degradation far better than cheap composite alternatives that crush and fail after a few heat cycles. Each gasket in the set is precisely cut and finished to ensure a flush, leak-free seal against header flanges; the 0.5 lb weight reflects a robust construction that won't compress into oblivion under header bolt tension. Proper gasket selection is non-negotiable for any build claiming reliability—cheap gaskets mean header leaks, air intrusion, and hours of troubleshooting.

This gasket set suits anyone from first-time SBC rebuilders to seasoned engine shops performing restorations or performance builds. It fits stock-port 283, 327, 350, and 400 cubic-inch small-block applications where header flanges are cast or fabricated to original specifications. Installation is straightforward: position each gasket on the header flange, align the bolt holes, and torque header bolts in a cross-pattern sequence to OEM spec—typically 25–35 lb-ft depending on bolt grade. Keep a set on hand for any SBC project, or buy now to ensure your next engine assembly stays sealed and leak-free from first startup to long-term duty.