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Porsche 911 After-Cat Exhaust System
We started from scratch to offer a complete high performance exhaust system for the Porsche 911. Extensive dyno testing on our in-house dynamometer afforded us impressive horsepower and torque gains throughout the entire power band. Headers and muffler are meticulously built by hand using T304 Stainless Steel for a lifetime of performance - guaranteed!
Using the highest quality stainless-steel these after-cat exhaust systems were constructed for the Porsche 911. Available in both single and dual-exit exhaust systems, and with choice of different size and style exhaust tips, the choices Billy Boat affords with its systems allows for fantastic customization of any Porsche 911. All of this makes for a 911 modification that is both incredibly stylish and functional.
The kit for the naturally aspirated Porsche 911 includes all necessary hardware, gaskets and accessroies needed for a complete installation. Factory-fit, cat-inlet mufflers are also available in a wide variety of applications and configurations with your choice of tips.
Please Use the chart below to decide which after-cat system is best suited for your Porsche 911 Application and choices: