3" piping was selected to reduce back-pressure while increasing horsepower and torque.
Dyno results for the Ford Focus ST 3 inch exhaust show a gain of 18 horsepower and 16 Ft-lb of torque over the factory exhaust system!
MBRP's Focus ST catback also features dual 4" double walled stainless T304 stainless tips. This
system is available in T304 stainless steel, T409 stainless steel, and aluminized steel.
