Yellow Speed Racing Rear 4 Piston Ultra Big Brake Kit - Mazda 626 1991-1997 (GE) fits_2005-2011`Mercedes-Benz`SLK so the product warranty is

so the product warranty is not covered by any sound issue

Piping Diameter: 3

UPPER MOUNT Aluminum w/ Hardened Rubber Bushings OR Pillowball Aluminum w/ Hardened Rubber Bushings OR Pillowball

Valves: Vacuum-actuated valves for instant sound control

UPPER MOUNT Rubber OR Pillowball w/ Camber Plates Aluminum w/ Hardened Rubber Bushings  OR Pillowball

Yellow Speed Racing Rear 4 Piston Ultra Big Brake Kit - Mazda 626 1991-1997 (GE) fits_2005-2011`Mercedes-Benz`SLK so the product warranty isYellow Speed Racings Ultra Series Big Brake Kit is designed for road and track use. This big brake kit features optimum braking performance, attractive looks, easy installation and a cost effective price. Factory brakes are designed primarily for daily driving on most applications. If you have added additional horsepower to your vehicle, or frequently compete in motorsports such as circuit racing, drifting, time attack or rally racing, then a big