Yep...this will knock a few dB off.
http://store.summitracing.com/partde...5&autoview=sku
I installed one in my OEM exhaust tip, after I found that my Borla "Turbo" was a little raspier than I would have liked.
The angle of the pic makes it look shorter than it actually is, in theory, the surface area of the perforations is greater than the cross section of the pipe feeding the tip, so it shouldn't restrict flow very much, if at all.
Also, it's a REAL tight fit, & required a rather robust amount of flogging with the two pounder, not to mention a box full of foul language...
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