ASR Front Upper Control Arm Spherical Upgrade knock sensor The AP caliper finish is Vehicle:12 13 Honda Civic (All Rear Disc Models Exc Si) The AP caliper finish is highly resistant to wear and deterioration under high heat track conditions Stainless steel caliper hardware for a long caliper service life under frequent pad change conditions The ASR "Revolver" is a high performance replacement for the rear trailing arm compliance bushing found on many 90s Civic and Integra worn and tired poly rubber bushings with spherical bearings for your aftermarket UCA Camber Kit or OEM upper control arms Replacing your suspension bushings will bring back the firm and responsive suspension feel your car once had