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I have a 03 Tacoma 3.4L V-6 and I went with a Borla muffler 1 in 2 out. The local exhaust shop fabricated custom pipes out of the muffler then added chrome tips. Sounds great, and nothing beats the performance. I could feel the differnce in air flow right from the shop, and this was before I added the TRD headers. I'm into performance more than sound. Tests results posted at the exhaust shop showed that Borla and Flowmaster taking 1 st and 2nd place showing about the same amount of hp gain. If sound is more important to you, then Flowmaster is lounder than Borla. I wouldn't buy any other exhaust besides those two.
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