I'm working on a cat-back system for the Mk2. The piping has been done for a while, but I just cannot find a suitable muffler. The first unit I used sounded horrible. I'd still like to go with a polished stainless steel can with twin tips. If you've got a muffler in mind, with 2.5" inlet (or anyone else for that matter), please let me know. Pricing for my 2.5" cat-back, depending on muffler, will run $375 to $400. Cya!
I realize this....but also bear in mind this fact: the stock system that came on your car from the factory did not have one. Not all mufflers require the installation of a resonator to tone down the exhaust note.
However, I agree that some do...but I think Aaron wants to provide a system with just muffler only, and a good exhaust note - without having to add a resonator to the system.
Also the cat is an effective resonator. The Brullen I installed w/o cat was way too loud, had to stick a resonator in the spot where the cat was, despite the resonator on the Brullen. I was a bit under $400 at the time and built like a tank. I think you could drive over the muffler without hurting it.
Some mufflers contain a built in resonator chamber as part of the design.
From another website:
"An exhaust resonator is used in some exhaust stystems to change the tone and timber of the exhaust sound. The resonator helps reduce the annoying vibrations of exhaust gas pulses with a length of perforated tubing inside an expansion chamber. The exhaust gasses partially escape the tubing diameter through the perforations into the expansion chamber. In the expansion chamber, the exhaust gasses expand and change tone. When the gasses re-enter the tubing, they rejoin the exhaust flow and dampen the vibrations of the combined flow, creating a more pleasing sound."
In general, you will get a more pleasant exhaust with one than without.
The SS Magnaflow mufflers I've looked at (dual tips) all have a 2.25" inlet, which I do not want. I may purchase the 3" inlet unit. This way, people can use it for turbo apps later down the road.
Thanks for the link, Darin, but I've checked there. It seems that Mk2 owners do like some nice tips on the mufflers, with a stock-like appearance. If I get the universal muffler, I'd have to purchase tips separately, and pay extra fabrication costs to affix them to the muffler. Take care.
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