Saves Thousands Of Dollars In Engine Repair Prevents Total Collapse Of Chain Tensions For those Porsche owners who prefer running the original equipment hydraulic chain tensioners, we very strongly recommend that you install Performance Products all new HydraStop. The HydraStop allows the hydraulic chain tensioner to function normally until there is a failure and collapse of one of the tensioners. With HydraStop the complete collapse is averted and the hydraulic tensioner is automatically changed into a mechanical chain tensioner. Learn More

Genuine Porsche PartReplacing chain tensioners is a fairly common repair on 911/930s. Upgrading to oil-pressure-fed chain tensioners will help eliminate the possibility of failure and engine damage. When replacing or updating your chain tensioners, take the opportunity to check and adjust your cam timing for optimum performance. Factory specs will give you a plus or minus tolerance. It pays to have patience and adjust it exactly to the specs, especially from left to right cam. You will notice better throttle response and power with spot-on timing. Learn More

Includes two cam timing chain housing covers, oil lines, two tensioners,  and all necessary fittings & seals. Tech Tip: Right-side cam tower oil line requires an adapter for 1973 and earlier engines to insure proper spacing and to help prevent oil line breakage. 1968-80 updates, if the older chain wheel supports are used, then two chain wheel support spacers are necessary part number 901562. For Oil Line Adapter, Use Keyword - Adapter, or Search by Reference number 901567. Learn More

Replacement Timing Chain Tensioner Bushing Replaces Porsche® Part Number 930.105.513.00 Late-style 1980-on chain wheel supports add insurance against premature chain tensioner failure. Improved geometry reduces the angularity loading, prolonging tensioner seal life. This also reduces side-loads on the chain wheel support pin, preventing damage to your expensive chain housing. Remember to inspect the cam wheel and chain sprockets, as well as the intermediate shaft gear.   Note: These Bushings Are Required For Installation of Tensioners 930.105.053.00 or 930.105.058.03   Learn More