Patriot Exhaust 66037 Seal-4-Good Exhaust Header Gaskets for Small Block Mopar, Rectangle Port, Pair

Patriot Exhaust part number 66037 Seal-4-Good exhaust header and manifold gaskets are designed for Small Block Mopar applications using rectangle-port exhaust headers. This matched pair provides a reliable sealing surface between the cylinder head and header flange, helping reduce exhaust leaks and maintain consistent exhaust system performance. The rectangle-port design measures 1.625 by 1.000 inches for compatibility with properly matched components.
Constructed from multi-layered aluminum, these gaskets provide durable sealing performance under the heat and pressure conditions found in high-performance exhaust systems. The layered construction conforms to minor surface irregularities while supporting a dependable seal during repeated heating and cooling cycles. Their compact profile is suited for installations where accurate port alignment and reliable flange sealing are essential.
The Patriot Exhaust 66037 gasket set includes two gaskets for a complete header installation on one engine. Verify the cylinder-head port shape, header flange configuration, and application requirements before installation. For best results, use clean, flat mating surfaces and follow the header manufacturer’s recommended tightening sequence and torque specifications.

Features:

• Brand: Patriot Exhaust

• Part Number: 66037

• Application: Small Block Mopar engines

• Product Type: Exhaust header and manifold gasket pair

• Port Shape: Rectangle port

• Port Opening: 1.625 by 1.000 inches

• Material: Multi-layered aluminum

• Quantity: Two gaskets per package