Clutch Bearing Simple installation upgrades your GM transmission to hydraulic clutch release. Built-in fail-safe retainer prevents over-extension of the hydraulic release bearing. Works with OEM-style diaphragm clutches for 3- and 4-speed GM transmissions. Works with aftermarket GM-spec Tremec TKO-500 and 600 5-speeds. Complete kit features hydraulic release bearing, anti-rotation studs, and air gap shims. Lower pedal effort compared to stock-type mechanical clutch linkage. Low-profile design fits behind aftermarket clutch pressure plates that are thicker. Easily upgraded to an external bleeder configuration. 3/4-inch bore master cylinder recommended for most applications. Speedway Motors engineered product offers high quality at an incredible value. Hydraulic Clutch Actuation for your Classic Muscle Car, Hot Rod, or Race Car For many enthusiasts, building a hot rod means it has to have three pedals and not two. A manual transmission is a MUST in their build. We certainly enjoy rowing through the gears ourselves and nothing makes that easier than a hydraulic clutch release bearing (or “throwout bearing” as some still call it). If you buy a new vehicle with a manual transmission today it will come with a hydraulic release bearing setup and that is for two primary reasons, pedal effort and packaging. These same two reasons are exactly why you should consider a Speedway Motors hydraulic release bearing kit for your manual transmission install. No longer do you have contemplate using bulky factory clutch release linkages that bind or take up valuable header and space and that require constant adjustment and maintenance, nor do you have to live with a heavy clutch pedal that has you reconsidering driving your pride and joy in any traffic. Using a hydraulic release bearing solves all these issues yet is easy to setup when installing your transmission