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SPEC: 1.48" intake, 1.15" exhaust, combustion chamber 21cc. Very modified 12G940 head, suitable for race applications and extensively modified big bore and long stroke engines.
All Longman heads are fully ported and polished and come assembled with Longman's exclusive valves, guides, springs and retainers.

Note: Longman cylinder heads are special order items and can have lead times of several months. Full deposits are required when ordering. Orders are cannot be canceled and there are no returns accepted.

Classic Austin Mini Gt4 Longman Head 1.48 1.15 Assembled Scca

Classic Austin Mini Gt4 Longman Head 1.48 1.15 Assembled Scca

Classic Austin Mini Gt4 Longman Head 1.48 1.15 Assembled Scca

SPEC: 1.48" intake, 1.15" exhaust, combustion chamber 21cc. Very modified 12G940 head, suitable for race applications and extensively modified big bore and long stroke engines.
All Longman heads are fully ported and polished and come assembled with Longman's exclusive valves, guides, springs and retainers.

Note: Longman cylinder heads are special order items and can have lead times of several months. Full deposits are required when ordering. Orders are cannot be canceled and there are no returns accepted.

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A selected range of modified cylinder heads are available to suit a wide variety of applications. All port and chamber modifications are carried out by experts to current state of the art specifications. Therefore, actual specifications may alter slightly as gas flow and port velocity efficiency improvements are developed. Where large bore heads are used on small bore engines (i.e. 12G940 casting on 948/1098cc block), it is necessary to check full lift of exhaust valve, and pocket the block as necessary.