My neighbor just bought an 88 M3 4 days ago. I raced him when he had the stock exhaust and chip and I beat him pretty bad. Today he installed a B&B muffler and a JC chip and we raced again. This time he kicked my ass. I have an AA chip and a Borla and evo airbox. I am definetly getting the JC chip again, I fried my old one. One thing guys...his B&B muffler sounds louder than my Borla....it sounds much better....it just looks like shit. The tips are welded together and the don't fill the exhaust cutout on the valence. I was seriously impressed at much faster his sharked M3 was compared to my AA M3. This weekend Adam P should be coming to Austin to get pics of the 4 M3's in my complex.