Fabspeed Porsche 997.2 GT3 / GT3 RS Side Muffler Bypass Pipes (2010-2011) Select Valve Configuration:Valved s: -8 / -3

s: -8 / -3

It is recommended that you service your BMC Air Filter every 15

Adds 21 whp (wheel horsepower) and 36 ft/lbs of torque at 3000 RPM

If you want the best of both worlds

964 Carrera European Pre-Muffler Cat bypass Pipe

Fabspeed Porsche 997.2 GT3 / GT3 RS Side Muffler Bypass Pipes (2010-2011) Select Valve Configuration:Valved s: -8 / -3HP Gain: +9 TQ (ft lbs) Gain: +10 WT (lbs) savings REAR: 34 pounds 17kg Optimized design that replaces the heavy and all very restrictive GT3 factory side mufflers for improved exhaust flow, increased sound, radiant heat, and massive weight savings. Available with or without SUPER PREMIUM HELICAL AEROSPACE Iso certified exhaust valves. FEATURES: Fits all Porsche 997. 2 GT3 GT3 RS vehicles 2010 2011 Replicates aggressive CUP car sound for the street no