I posted some images last week in the technical Q&A in MAF vs MAP thread, here they are again. The Tubi tips shown are only stock diameter. They are being replaced with 3 inch in/out cans. Because they encourage bigger bangs and lose less exhaust energy going through, the big pipes need more silencing. The car is louder despite the 3inch x 36inch resonators compared to the same Tubi tips on the no muffler stock exhaust. The "classic V-12 sound" they make would please all of you and make the change worthwhile despite the big power increase you would have to live with. The cost was $6k for the pipe fabrication. A pair of high flow cats could easily be welded into the cat delete pipes if needed. Stop watch testing in 3rd gear from 100kph to 160kph (4850 - 7500 rpm) has shown repeatable 3.8 sec. Realising we are not exactly comparing the same thing because you would normally have a 2-3 shift in that speed interval, the times achieved match EVO's 599 time of 3.9 sec and wallop the 575 time of 5.4 sec for the similar 60-100mph interval. Yes Darth550 "You're right, 3" exhausts do blow hard." They will blow your blouses right off. And when I get my ECU's re-mapped by DMS or Powerchip I look forward to posting some accurate performance data on this thread.