Competition big bore inlet / exhaust manifold gasket B-series MGB MGA

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Maximise exhaust flow and eliminate gasket failure with this premium heavy-duty manifold gasket. Specifically designed for "large bore" competition manifolds, this gasket is built to withstand the extreme temperatures and pressures of high-performance B-Series engines.

Product Specs

• Part Number: JA442
• Type: Heavy-Duty / Competition Spec
• Compatibility: All BMC B-Series engines (1500, 1600, 1622, and 1800cc)
• Design: Large bore ports for optimized flow with performance manifolds
• Application: MGA, MGB, MG Magnette, and B-Series based racing specials

Why Choose This Competition Gasket?

• High-Heat Resistance: Constructed from advanced materials that won't blow out or "burn through" under racing conditions.
• Large Bore Ports: Prevents the gasket from obstructing exhaust gas flow—essential when using aftermarket LCB or big-bore headers.
• Superior Sealing: Features a reinforced core that conforms to slightly warped or uneven manifold flanges better than standard items.
• Race-Proven: The industry standard for reliability in historic rallying, road racing, and fast road applications.

Installation Tip: When fitting a competition manifold, ensure your manifold and cylinder head faces are perfectly clean. We recommend re-torqueing your manifold nuts after the first heat cycle to ensure a permanent, leak-free seal.

[Large bore heavy duty competition manifold gasket for all B series engines.]

[JA442]