Originally Posted by Damien_C
Lmao, ehhh nah

If that was the case every race car in the world would be running a standard exhuast system
Generally standard exhausts are very restrictive. Alfa ones are very good but you can always do better

The supersprint and CSC seem to be the best.
No!
Racing cars have racing engines and commensurately exhausts are designed to suit the higher state of tune.
The standard exhaust is designed to go with the engine's "standard" state of tune and altering to a big-bore etc etc will make very little difference (if any at all) to performance. Ditto for induction kits.