These are a unique design optimised for sound and power with a larger bore 2.5" allowing greater gas flow, produced by Powerflow Exhausts. They are made in the UK and fit the OE parts; the 63MM piping comes with a joiner that tapers down to meet the original 55MM piping.
| Make | Porsche |
|---|---|
| Model | 911 (997.1) |
| Year | 2004,2005,2006,2007,2008 |
| Engine Size (L) | 3.6,3.8 |
2 reviews
2 out of 2 (100%) customers recommended this product.
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Beautiful sound from these big bore cats for my 997 Carrera, very simple fitment with perfect alignment. Small power gains and a great sporty tone. Cheers.
Super powerful cats for my 997 Carrera, these have given a very impressive sound and volume upgrade. So much more impressive compared to the stock cats as these are deep and aggressive as well as a good deal louder. There is also a nice power gain too from these as they massively improve the flow of the system. Highly recommend as these sound and performance amazingly.
