Timing Chain Kit for BMW M57N & M57N2 - IWIS German MadeTiming Chain Kit for BMW M57N & M57N2 Kit is manufactured by IWIS This kit includes 2 x Timing Chains 4 x Chain Guides 1 x Hydraulic Tensioner AIC guarantees 5 years and up to 75,000 kilometers! That's something you can rely on! Many other timing chain kit suppliers brand their chains as OE quality; that may be true, but it is not the case for the rest of the products included in the kit. Unlike IWIS, in all IWIS timing chain kits, every single