True Dual After H-Pipe 5.4L F-150, I experienced too much interior drone with the recently added X-Pipe. Today I had a custom H-Pipe fabricated in place of the stamped X-Pipe. The new H-Pipe crossover is a short 2.25 section of tubing welded in between the 2.5 true dual piping. Interior resonance is still there, but a bit less than with the X-Pipe. System as of today: JBA Cat4ward headers into Catco 2200 series high flow cats, custom H-Pipe, Magnaflow 11379 4x9 11 body DIDO muffler, Magnaflow stainless 18x3.5 tips..
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| True Dual After H-Pipe 5.4L F-150 |
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