Luisef

Hello friends i have a JDM B18C and occupied change the exhaust, which is the best diameter 2.5 "or 3".
Diameter which gives the best performance?

Thanks

angryhillbilly

3" for top end. 2.5 for mid range I believe is the current belief.
Depends what the car is going to be used for. How loud you want it and all that.
Ill say it now though. Try doing a search in the all motor forum. Im sure this topic is probably covered atleast once a week.