I had the Herrod Stealth System put on by a dealer, cold air induction & Herrod new exhaust, but the system was not dyno'd by the dealer....big mistake and I should have known better....and I should have read the tech info on this site first ! Car went fast - but only for a while Compete rebuild required. No more off the shelf edit's for me, custom only from now on, although now re-running-in stock edit. Will also give me some thinking time...... ← Sorry to hear but thanks for sharing. Just prospective off the shelf tune purchasers need to know. Given it was a dealer that installed it for you I take the rebuild was covered under warranty