Installed new rinehart system today on my 04 fatboy. Install was pretty straight forward, no clearance problems. Initially had a couple of questions, called Bub 2x and spoke w/terry on tech line. Phone was actually answered by a real person. He was a big help and gave a couple of good tips to make installation go smoother. This system replace 16 gauge double barrels and though I only rode it a couple of miles, difference is immediately obvious. Better throttle response, much better low/mid range. Engine seems like it is working easier and getting much better performance. Maintains real harley sound. Gained over an inch of clearance as measured w/bike on side stand. Will put on about 75 miles tomorrow and check tightness of everything. Dyno run scheduled in april. Engine is 95, httc heads, pistons, 42 mikini, etc.