i am not stepping on Trevor here, but when we ran the FMS in truggy we preferred the Nova 086 with Nova long header...it seemed to run cooler, tune easier and be crisper, it was a modded engine though so that for sure can play a factor in there. in buggy i think you can run any pipe you want and it will still be too much, but if you have not tried it in a buggy it is fun LOL