Valve guide Kit BMW M50 S50 S52 M52 M54 TVR They created channels for the

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Valve guide Kit BMW M50 S50 S52 M52 M54 TVR They created channels for theOur valve guides are precisely made of high quality manganese bronze. The Supertech valve guides are designed to be used in conjunction with our valves with low friction black nitrided material to provide the best solution in terms of both performance and durability. In the case of exhaust valves designed for use in high power engines that require a better heat transfer coefficient, we use a copper alloy conductor. Copper has about three times higher