VIPER REAR CALIPER UPGRADE DETAILS
Use stock rear rotor or any compatible Viper rotor
Retains OEM brake pad size for largest choice of compounds
Keep OEM brake line fittings and hoses or use stainless upgrades
Mounts with factory hardware in original location, no added brackets
Uses unmodified factory rear suspension upright
Fits under 17” and 18” wheels as well as the spare tire!
Undetectable by external inspection, even with caliper removed
40mm piston size increases brake clamping force by 23%
Greater rear braking power reduces front tire lock-up
Balancing brake system allows better modulation
The Viper stock front brakes are Brembo 4 piston calipers with differential bore sizes of 38mm and 42mm. The rear Viper caliper is a 36mm single piston floating design originally from a 1988-1992 Renault Alliance/Eagle Premier and currently used on the Lotus Elise. Front to rear brake balance is a result of front to rear piston area:
Because the stock rear calipers do not produce sufficient brake torque, the factory brake system tends to easily lock up the front wheels. The StopTech® Front Big Brake Kit achieves better balance by going to smaller front pistons but the same area ratio is reached with a 38mm rear piston size. The larger 40mm piston provides even greater rear braking power, better overall balance, and can be installed without having to modify the factory proportioning valve or add an adjustable proportioning valve.
StopTech® is not associated with nor endorses this product or the information provided.