just got a full 3" turbo back exhaust installed to my R34. Runs a little sluggish in low rev range and when i floor it, it backfires in beginning. Mid and high range it runs good. rest of car is stock.
1. Anyone else experience this after install?
2. Exhaust place said it is running rich, is this so?
3. Should i buy a piggyback computer? Apexi SAFC?
Thanks for any help.