The exhaust place i've found have asked for an underbody shot of my car for an idea of the job in hand. I cant get mine on the ramp at the minute, Has anyone got any shots I can use? Own photos or press are fine.
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C4 UrS Exhaust Details
There are some exhaust details here:
OE 3B, AAN, ABY and ADU Exhaust Components: a consolidation of info:
And more for what you are looking for:
OE system on the ground:
Aftermarket cat back Stebro:
Aftermarket custom-fabbed (probably with 034 down pipe) (NOTE: Do NOT try to skip the center muffler/resonator - if you do you will get massive droning at 75 mph (130 kph)).
Photo courtesy of Dan T. (ringbearer) in California
Photo courstesy of Dan T. (ringbearerererer in CaliforniaLast edited by UrS4boy; 8 January 2015, 23:40.RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant -
JP had a 3" straight through to a stock back box, apparently no drone and made 575 bhp.Current-2004 Impreza PPP wagon
Sold-92 3B coupe-RS2+, 996s, konis, rear torsen, forged rods........
Sold ABY-stockComment
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Awesome. Thanks guysComment
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How much drone are we talking? My two box system drones anyway. It's going to www.stainless-exhaust.com in Huthwaite. Apparently, expensive but good!Comment
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My experience is that the drone is unbearable unless you use as big a volume for the boxes as you can fit. The stock back box is good as it's huge but restrictive.
I'm running a setup with 2 2.5 inch pipes and a valve in 1 that opens on over 0.5 bar boost. Quiet at cruse and good flow. 0.25 bar back pressure at 450 bhp with this setup.
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Jeez Dave, no photo credit
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The system in the pics has a bit too much drone or bass imo. I am going to try an OE rear muffler and see if it is too restrictive. V bands will make it easy to put back if I don't like it.Comment
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