dwcopple
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- Jul 27, 2019
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Anyone ever ran Flowtech Raptors on their 4.6?
Somebody way back did a comparison test of different cat back systems and Magnaflow and Bassani were a few that actually showed a HP gain. Flowmasters lost HP. This test was performed with actual dyno testing. I ran the Magnaflow system on my '94 Cobra because they offered a full warranty on the mufflers and pipes. I had Dynoflows on it when I bought it but they only warranted the mufflers and I don't think the pipes were stainless steel.@lwarrior1016 can chime in with first hand [Coyote] experience with Flow FX mufflers.
I suggest Magnaflow or Dynomax Ultraflow welded mufflers.