Down pipes, piggy pipes (gutted pre-cats), or cut out the precats and weld in pipe/flex-pipe in place. Down pipes cost cheddar, piggies take a while to gut out. Who's just deleted the pre-cats by cutting them out? If so, what did you use to bridge the gap? Pipe or flex-pipe?
Secondary cats are bigger than primary.
Here is a video http://www.youtube.com/watch?v=RxnYH3JONkE both cars got straight pipes, one of the cars both cats deleted, the other one only secondary.
Zmey installed his mufflers back and it sounds very nice.
Only took me 45 minutes per pipe to gut......just sayin.
'03 RS6: Full APR EMCS/TCU, Nurburgring Bronze 19x8.5, Freshly Rebuilt Turbos, Gutted Precats, Stern Racing Mounts, SAI Delete, Aux Radiator Delete, Venair Hoses, Koni Yellows.....
Sounds about right...Originally Posted by Beardown1
Ace/Edge TC - Tozo Trans - MTM TCU - REVO/ME7 tune - Wagner IC's w/ Venair Hoses - Aux Radiator delete - Hotchkis Sways - Hawk HPS Pads - Koni Sport Struts - Scroll KO4 Turbos - Devil's Own WM - 421whp/452wtq on Mustang Dyno - http://www.audirssix.com
Yep...about a half hour per side to gut the pre-cats...Pipe in the vise and a big hammer and chisel or steel rod...and just keep smashing...I had gutted precats, no cats and SE mufflers...sounded perfect with no drone...
2013 Audi S8
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