A Triumph 650 cylinder head is modified to receive 6mm stem valves and beehive valve springs to incr...

A Triumph 650 cylinder head is modified to receive 6mm stem valves and beehive valve springs to increase the performance and revability of this 2-cylinder engine. For more information about cylinder head modifications and race preparations, call John Edwards @ Costa Mesa R&D Automotive Machine @ (949) 631-6376. www.engine-machining.com
This is the head that was featured in the new DVD movie "Brittown".