Upper timing chain to fit TVR Speed 6 engines. This is the upper duplex timing chain for the TVR Speed 6 engine. If you are thinking of purchasing this part for a major Speed 6 engine build then please consider the uprated Simplex conversion kit TVR RG 102 as listed in the related parts. This kit contains all sprockets, chains, oil feed, tensioners and uprated needle roller bearing halftime assembly to convert the Speed 6 engine from Duplex to Simplex. This is a significant performance benefit as well as major upgrade to the halftime shaft and bearing assembly. See TVR E6299 KIT for a complete set of timing chains.