The stock 997.1 Turbo exhaust uses 118mm 600 cpsi catalytic convertors (cells per square inch). Our 997.1 Turbo sport exhaust comes with less restrictive 153mm Emitec 100 cpsi sport cats.
The sport exhaust features:
- Extra large 153mm/6-inch 100 cell sport cats
- Heat shields around the sport cats
- Large 84mm transition tube between sport cats and mufflers
- High volume mufflers
- Expansion bellow between the muffler cans
- Heat shields around the mufflers
- Same weight as the stock exhaust
- Same ground clearance as the stock exhaust
- Extra low backpressure
- 4 year full warranty
- High tonal quality
The foils of our 153mm sport cats are perforated with holes so the exhaust gas flow can enter into the neighbouring channels. Conventional cats have just an axial flow pattern while our cats will flow axial, diagonal and radial. The exhaust gasses spread evenly inside the cat which results in lower backpressure. These type of cats are also used on the current Porsche Supercup cars.
The cross section of our 153mm sport cats is 40% larger than 130mm cats, 60% larger than 118mm cats and over 100 % larger than the commonly used 108mm cats.
These larger 100 cell cats will create less backpressure than higher density cats of the same size (same diameter + length). Low backpressure on turbocharged engines is beneficial for both the horsepower / torque and the throttle response.
The volume of the sport cat, its total surface area, the amount / content of the precious metal coating and the addition of heat shields are the key factors in having a long lasting trouble-free cat converter. A large catalyst surface area allows for better exhaust gas conversion efficiency, durability and cleaner air.
We don’t offer 200 cell semi-sport cats on our sport exhausts because these are more restrictive than the real 100 cell sport cats. Our big 100 cell sport cats do not cause emission issues or check engine light problems.
The heatshields around our catalytic convertors allow for quicker heat up during cold start and to prevent them from thermal shocks. The muffler heat shields reflect radiant heat away from the engine timing belts.
Our sport exhaust makes the 997.1 Turbo sound like a Porsche. As soon as you’re making boost (0.2 Bar on the dashboard) the turbo whistle becomes very prominent. Also, everytime you let off the gas abruptly, there is a whoosh sound which is really addictive.
The exhaust comes with an installation guide, new hardware and the proper tools.
Comes with enlarged OEM chromed oval 76mm/3-inch tailpipes
Maximum backpressure: 0.12 Bar/1.75 psi (stock exhaust: 0.44 Bar / 6.4 psi)
Minimum +20 hp / +24 Nm
Not recommended on Tiptronic
Not recommended for owners with sensitive ears