I can't tell any difference with them on or off. I do have them on as they look cool and zip tied in so they don't blow out and not as easy for someone to try and swipe off the car if I happen to make a quick run into the gas station.
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2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |
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