adrenaline81 Posted May 21, 2015 Report Share Posted May 21, 2015 I am planning on upgrading my exhaust system, but I have a few questions before I start picking and choosing what I want to purchase. Are the stock catalytic converters hi-flow? What is the exhaust system pipe with from the cat back? 3"? How many chambers does the stock GT500 muffler have? Does anyone know where there's a sound click of a stock GT500 with resonators deleted? Any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
Dave1968 Posted May 30, 2015 Report Share Posted May 30, 2015 I have a 2014 GT500, I put the off road H pipe on and that's it. I couldn't see Ford putting a restrictive muffler on a car where they had to put Cats on and still get 662 HP. The H pipe flows really well and the sound is second to none. Quote Link to comment Share on other sites More sharing options...
Jocelyn J Lepage 7741 Posted June 12, 2015 Report Share Posted June 12, 2015 I have a 2014 GT500 as well with just under 4000 miles. Everything I have read or viewed on You Tube, states that GT500 use high flowing CATs and the exhaust system is 2.75" ID. I installed a K&N cold air intake to remove the factory baffled air intake that eliminates the sound of the super charge spooling up, whine, above 4000 RPM's. At the same time, I installed a Borla S-Type CAT back exhaust system, 2.75" ID due to my taste in visual appeal of the quad rolled edge exhaust tips. The Boral system sounds more evil than the factory sound, deeper notes through out the exhaust band, no droning at highway speeds and very quite during city driving. Adding the Borla system along with the K&N cold air intake really it woke up the engine even more, if that is even possible. Throttle response and torque has definitely improved. Quote Link to comment Share on other sites More sharing options...
Radical08 Posted June 18, 2015 Report Share Posted June 18, 2015 Put the H-Pipe in Lethyl sells, get the cats out, add magnaflow axle back and badass but not annoying and free up the flow Quote Link to comment Share on other sites More sharing options...
freakshow12 Posted June 19, 2015 Report Share Posted June 19, 2015 I like my FRPP axle backs Quote Link to comment Share on other sites More sharing options...
07 Black Beauty Posted June 21, 2015 Report Share Posted June 21, 2015 I'm running the Supersnake axle back w/ an MRT O/R H and it sounds really good. Quote Link to comment Share on other sites More sharing options...
rzide Posted October 8, 2015 Report Share Posted October 8, 2015 whats the difference in the H-pipe and the X pipe? Quote Link to comment Share on other sites More sharing options...
twobjshelbys Posted October 8, 2015 Report Share Posted October 8, 2015 whats the difference in the H-pipe and the X pipe? Look for a picture. But basically the x-pipe meets in the shape of an x in the middle. The H has a short bridge between the two. Quote Link to comment Share on other sites More sharing options...
Dave1968 Posted October 8, 2015 Report Share Posted October 8, 2015 The H pipe will give you more low end torque whereas the X pipe works high up in the RPM range. Quote Link to comment Share on other sites More sharing options...
twobjshelbys Posted October 8, 2015 Report Share Posted October 8, 2015 The H pipe will give you more low end torque whereas the X pipe works high up in the RPM range. Maybe, by single digit numbers. The primary difference is the sound. I prefer the H-pipe. Shelby GTs had a X. Quote Link to comment Share on other sites More sharing options...
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