Just installed my spintech dual side exhaust last weekend! Nice and sweet! First I took the car and had the pipe cut off behind the stock muffler (no way could I have done that on jacks in my driveway!). Spintech included easy to read and understand instructions, so the rest was just a simple un-bolting of the old exhaust and installing the new kit. The only problem I encountered was that I ordered the Cobra R tips which were 3" and they wouldn't bolt up to the 2.5" pipes. BUT not trusting my exhaust tech skills or the U bolt clamps, I took the car to a professional (Gus at Classic Muffler in Woodland CA) and had everything snugged up nice and tight and welded, including the tips. Sounds great!, looks great. No drone and no riceness.