Clutch Masters 725 Series Clutch Kit for 2017-2021 Honda Civic Si & Ex.
When upgrading the 1.5L Turbo engine in your Civic quite quickly the stock clutch becomes incapable of supporting power upgrades and more aggressive driving on a race track. The 725 is the ultimate twin disk setup for drag racing and serious horsepower and torque over stock and is a must have to put the power to the ground!
The 725 series kit is a 7.25″ (184mm) Twin Disc clutch and is machined from billet aluminum and is then Type 3 hard anodized. By machining the strongest cover possible while maintaining minimal weight, Clutch Masters was basically able to eliminate any flex in the cover. The billet covers see only .003″ of flex where as a cast or stamped unit can see as much as .030″ of flex. By eliminating this flex in the cover, the driver is able to operate the clutch much more consistently and confidently. The strength of the covers also results in greater clamping force over the same amount of area vs. a cast or stamped cover. This means the twin discs are easy to drive and have superior clamping force to make sure all the power your engine is making is being utilized.
What makes the 725 Multi-Disc Kits truly special, and a feature unique to Clutch Masters is the QR System, or Quick Release Pressure Plate. The QR System Incorporates three spring-loaded bolts allowing the pressure plate to engage and disengage evenly and smoothly while reducing internal clutch noise/chatter by up to 50%. The QR System was developed to provide quiet and smooth operation for the street user while delivering the performance a multi-disc race clutch needs.
Flywheels are made for each specific application in steel. Steel flywheels are machined from 1045 billet cores and are then black oxide treated for rust prevention and meet SFI spec 1.2 for competition in NHRA, NDRA, IDRC, IHRA, SCCA and NASA.
This kit is specifically designed for the serious drag racing with very significant modifications to their Civic and most importantly one of our infamous Brewed tunes.