Originally Posted by sambb
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I have the resonator still. I'm about to put in a non resonator length instead because I have one spare just sitting there ready to go. I have no qualms about doing that from a noise point of view. From what I've picked up over the last few years lots of people have de-resonated their cars and found that it has absolutely no effect. The resonator is a straight through design and is a small diameter chamber so I doubt has much effect at all. I'm guessing its placement was designed to pick off droning frequencies at cruise speeds (it obviously wasn't effective for the outlay because it was dumped by VW after one year) but at full noise I doubt it has much dB cancelling effect at all - that's not what resonators are for. If you are worried about permanently welding on a straight section you can do what I did and buy a set of exhaust flanges for 2/1/4in pipe. Put a cut in right against the muffler, flange the exhaust pipe and then flange the straight pipe section that will go out the back. Whoever does the job will have to weld on two hangers onto the straight pipe that will support the pipe. If its too noisy for you then buy one more flange and get it welded onto the short length of the pipe left on the muffler and just bolt that back in. I'd intended running the muffler on the street and removing it for the track but now the straight pipe just lives in there. My straight pipe is a funny size because I did it in aluminium (because its light, I could make the hangers at work out of aluminium too and also make the aluminium flange) so is 2/1/3in which is bigger than the OE steel pipe. That might make mine noisier than a continued section of 2/1/4 with a single tip but its hard to say for sure.. If you're ever in Sydney, I still have two OE mufflers. You can hack off the twin tail pipes and get them welded on so it all looks stock rather than my single.
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