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 |
