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SVT Shelby GT500
worthwhile performance gains from 2.5" exhaust to 3"
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<blockquote data-quote="Robert M" data-source="post: 16384786" data-attributes="member: 9628"><p>My personal experience, not internet chat. I changed my 725 Super Snake from the oem 2.5" cat forward and Shelby installed Borla Touring 2.5" catback which was the 50 state legal set up that was standard install on a 2008 Super Snake, to the Shelby/JBA 3" mandrel bent manifold back exhaust system that was called the "Super Snake 700 optional exhaust" which was available years ago through Shelby Perf. Parts. I also installed a pair of ceramic FRPP shorty headers with the 3" and my 725 came alive. The difference in the engine rpm spin-up was noticeable, not that the 5.4 had problems spinning up with the 2.5", but the quickness of the spin-up was surprising. I also lost some boost with the 3" and mentioned that to Rick at Kenne Bell in a recent conversation, he said that was good (the loss of boost), boost is restriction, you lessened the restriction, that is why the engine is spinning up so much quicker than it was with the 2.5".</p><p></p><p>^^^^^Just my personal "installed" experience. The FRPP shorty's and 3" Shelby/JBA was louder than the oem manifolds, cats and Borla Touring and the first time I started the car after the exhaust change I was surprised the difference in tone and volume. I recently removed the Shelby/JBA 3" X-pipe and installed a 3" MAC Pro-Chamber, I can not say I noticed a large difference in that change, but the change for 2.5" to 3" along with the shorty's, THAT was a Big change in the way my car breaths.</p><p></p><p>The 3" MAC Pro-Chamber installed......</p><p></p><p>[ATTACH=full]1629369[/ATTACH]</p><p></p><p>^^^^^ I can't say there was no gain with the MAC PC, I have not driven my car much since that install.....</p><p></p><p>The "manifold back" 3" tucks nicely with plenty of ground clearance.</p><p></p><p>[ATTACH=full]1629370[/ATTACH]</p><p></p><p>R</p></blockquote><p></p>
[QUOTE="Robert M, post: 16384786, member: 9628"] My personal experience, not internet chat. I changed my 725 Super Snake from the oem 2.5" cat forward and Shelby installed Borla Touring 2.5" catback which was the 50 state legal set up that was standard install on a 2008 Super Snake, to the Shelby/JBA 3" mandrel bent manifold back exhaust system that was called the "Super Snake 700 optional exhaust" which was available years ago through Shelby Perf. Parts. I also installed a pair of ceramic FRPP shorty headers with the 3" and my 725 came alive. The difference in the engine rpm spin-up was noticeable, not that the 5.4 had problems spinning up with the 2.5", but the quickness of the spin-up was surprising. I also lost some boost with the 3" and mentioned that to Rick at Kenne Bell in a recent conversation, he said that was good (the loss of boost), boost is restriction, you lessened the restriction, that is why the engine is spinning up so much quicker than it was with the 2.5". ^^^^^Just my personal "installed" experience. The FRPP shorty's and 3" Shelby/JBA was louder than the oem manifolds, cats and Borla Touring and the first time I started the car after the exhaust change I was surprised the difference in tone and volume. I recently removed the Shelby/JBA 3" X-pipe and installed a 3" MAC Pro-Chamber, I can not say I noticed a large difference in that change, but the change for 2.5" to 3" along with the shorty's, THAT was a Big change in the way my car breaths. The 3" MAC Pro-Chamber installed...... [ATTACH=full]1629369[/ATTACH] ^^^^^ I can't say there was no gain with the MAC PC, I have not driven my car much since that install..... The "manifold back" 3" tucks nicely with plenty of ground clearance. [ATTACH=full]1629370[/ATTACH] R [/QUOTE]
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SVT Shelby GT500
worthwhile performance gains from 2.5" exhaust to 3"
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