Hey.. I have a 95 GSR/B20 Teggie, And i have stock crush bent piping under my car, and i have an apex n1 muffler, but i still get rice farts, i need some new headers...but i dont know if that will make a difference, and of you guys have stock piping with an n1 ? have the same problem, is it the piping for sure ? if i got it fixed to mandural bent would i get more performance ? heeeelppp!

 

you will get better air flow with the mandrel bent piping but not a notice that is going to really make that much of a difference.