- Apr 3, 2017
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After getting a cat-less h pipe installed onto my 2006 automatic mustang GT which already had the slp loudmouths axel-back, I immedietely noticed a huge loss in torq. Was this a result from a lack of back pressure through my exhaust system (no cats, no mufflers) and what might I be able to do to correct this issue. Also I have not yet gotten a tune because I wanted to wait to make sure I had the right setup first.