Porsche 997.2 C2/C2S/C4/C4S/GTS Exhaust Mufflers with Sound Valves Cooling Systems which is the top of

which is the top of the line aftermarket solution for catalytic converters

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Our dyno testing showed an increase of + 18 crank HP /15 whp (whp+ horsepower at the wheels) and 22 FT LB crank/ 19 ft-lbs of torque at 4000 RPM

Unplug exhaust valve harness from back of transmission

We use a German-made HJS HD tri-metallic 200-cell catalytic converter for the best performance and reliability

Porsche 997.2 C2/C2S/C4/C4S/GTS Exhaust Mufflers with Sound Valves Cooling Systems which is the top ofGet the sound the 997. 2 Deserves, the factory exhaust just doesn't cut it on the DFI engine, these NHP Mufflers with Valves will certainly improve the exhaust note on your 997. 2 PRODUCT FITMENT: 09 12 Porsche 997. 2 All Models except for Turbo and GT3 If you want the best mufflers for your 997. 2 look no further. This Exhaust has designed mufflers with sound valves for the Porsche 997. 2 Carrera , these are by far the highest quality mufflers