Flowmaster inlet size
The stock mufflers are getting louder quickly now. To be honest I like the sound of the car right now but it won't be long until they sound like exactly what they are...rotted out mufflers.
The classic 40's sound good on a wide range of cars...i'm not so sure a GXP with stock size exhaust is one of them cause i went right from stock to basically a full 3" offroad system with no trials in between. The 50 series should be more mellow than 40 and a bit quieter too.



