Best flowing catback?
but the BEST flowing catback would be the 4" mufflex...assuming you put a good muffler on it. i think they come with flowmaster
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"I think they are all pretty close . Would be interesting to see if there is any difference between them when installed on the same car and run on a Dyno"
agreed and AGREED!
figure the worst flowing catback is probably the flowmaster, and my guess would be you'd still see 10hp over stock. best (3" pipe) catback would be either the loudmouth or rumber, and figure those are good for 15hp.
so with the dozens of choices, and only a 5hp range, go with sound, look, and budget.
or better yet....go TDs
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When I had h/c on my 346, it made 460/408 thu the SLP 20tl, and 466/410 with the 4inch Ipipe open at the end of the TA. Over the smooth blend to 3.5 over the rearend, then 3.25 into the mufflar.









