Hey guys i bought a used 2008 m3 about 6-7 months ago and found out that it had a bmc filter in it... so i bought a pair of Rpi scoops a month after owning. Then a few months later i bought a Rpi GTM axleback and was told that the car had a previous exhaust on it either gintani or Agency power i was told because who ever cut it cut it uneven...so after seeing how this person had mods i sorta want to find out if it does have a tune... on a dynojet i did 356whp with scoops filter and axleback... Anyone know how to tell ? I was told try to see how high the rpms can rev but i wanted to know if any other alternative way. I was planning on doing a X pipe setup and if i had a tune that would be a $$ save
Thanks for reading this and helping me! been searching and cannot find any results
