Fabspeed Porsche 997.2 GT3 / GT3 RS Side Muffler Bypass Pipes (2010-2011) Select:Select Valve Configuration=Valved Our state-of-the-art GT4 RS tune

Our state-of-the-art GT4 RS tune software upgrade is designed to work seamlessly with additional modifications

Eventuri can set their own parameters within a confined space

With perfectly optimized headers and EMITEC HJS German imported high-flow racing catalytic converters

8 liter GT4 and after perfection and dyno verification the technology trickled down to the 987

Fabspeed Porsche 997.2 GT3 / GT3 RS Side Muffler Bypass Pipes (2010-2011) Select:Select Valve Configuration=Valved Our state-of-the-art GT4 RS tuneOptimized 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 resonance no drone More power +9HP and saves 44 pounds 22 KG OFF the