Standard replacement exhaust valve suitable for TR5-6 cylinder heads. As well as the standard valve we can also offer a choice of oversize inlet and exhaust valves. We also supply a thin stemmed lightweight valve which increases the efficiency of the gas flow. All valves incorporate race derived, diminished stem behind the valve head face to again improve the gas flow of the cylinder head. Please contact 01427 616565 for further details and to discuss the options available .