The factory exhaust manifolds on your S550 Mustang GT are a known restriction. Speed Engineering's 1-7/8" longtube headers replace them with a free-flowing, direct-fit stainless system that unlocks real horsepower, improves throttle respons...
Reviews
5.0
7 ratings
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Excellent product
Super fast shipping, the product made very well I have a 2020 mustang gt with a g3 supercharger these headers and x pipe fit perfect all the clamps were there Two sets of hardware two sets of gaskets and extensions for 02 sensors were there. The headers were well made I am a welder I know good well also they were mandrel bent and welded at plate and collector not like other companies that have random welds on the pipes. I recommend these instead of krooks
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Jessee · April 26, 2026
Good price and fast shipping.
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Jody · June 6, 2026
I was worried about fitment when I first ordered but everything fit like it was supposed to and communication was top notch. I emailed at 5pm about one of my packages being delayed a day and i received an email right back explaining what had happend. 5/5 definitely will be shopping here again