Cross over pipe

I added a 3" TTI X-pipe ending with Dynomax Ultraflo mufflers to my 360 Dart Sport and it picked up between .05 and .10. X-pipe helped and mufflers didn't hurt. But I'm using bullet mufflers on my next project to save space around the driveshaft & 8 3/4" differential.

You may have to re-jet to optimize it and have to factor in the weight. I removed the weight added by the system (60+ lbs) from elsewhere in the car to keep my "race weight" the same. Your results may vary.