Longman UNLEADED cylinder head
Longman's typical and excellent workmanship has been applied to these ported street heads. Intake valves are 1.4" diameter, exhaust 1.15, the same as late Cooper S, and both inlet and exhaust are Longman's own stainless valves. Valve guides are the latest silicone bronze material, and hardened seats are installed for trouble-free use with unleaded gasoline. As always, the porting and chamber work is top notch. Longman heads come fully assembled with dual valve springs and very nicely painted bright red. The GT6 longman head is an 11 stud head but will work with the 9 stud block also.
Combustion chamber is 21cc as supplied but can be order to your specs.

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.