DIY Exhaust Mod – Gain of 10+ HP!!!

[chipmunk]

I took my Toyo Sports exhaust off and put the std exhaust back on - resonance took the pleasure out of driving the car. It's a tiptronic and the box generally keeps the revs in the 2000rpm range until you are over 60mph, or you keep it in manual mode. Pity really as there was a noticeable increase in performance with the sports exhaust and it sounded good, when it wasn't resonating!

I've now drilled 2 x 10mm Crios holes in the pipes (thought I would start small). Definite increase in sound when idling but nothing really at higher revs - as you would expect. Think I'll take it up to 1/2 inch (13mm) and see how that changes things. I'll also record the sound and post it in case anyone wants to see the difference - unfortunately don't have a recording of how it was originally.