H or X pipe ?

surfbeast · 03-16-2002, 07:44 PM

Hey ya'll,

Will the 2.5" "H" or "X" pipe fit into the stock cat back 2.25" pipes? If not what do you need to do, replace the cat back? What about the stock headers?

Thanks

esandes · 03-19-2002, 05:38 PM

Stock V8 exhaust pipes are 2.5" I believe. Thats from the header to the tailpipes. You shouldn't have any problems with fit or flow going with aftermarket exhaust parts whether it's just the replacement of the stock H pipe or headers or the cat-back. For the best bang for the buck, replace the stock H pipe that has 3 cats per side and go with X pipes. The 99+ GT's have only 4 cats compared to our 6.

91LX2Bfast · 03-20-2002, 09:54 AM

No, they are indeed 2 1/4", but it still will bolt up fine.

03-16-2002, 07:44 PM	#1
surfbeast Registered Member Join Date: Feb 2002 Location: Maryville,TN Posts: 415	H or X pipe ? Hey ya'll, Will the 2.5" "H" or "X" pipe fit into the stock cat back 2.25" pipes? If not what do you need to do, replace the cat back? What about the stock headers? Thanks __________________ 98 GT / convertable -98 Saleen engine, Saleen appearance pkg. SHM cams,P&P NPI heads, and so much more!

03-20-2002, 09:54 AM	#3
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	No, they are indeed 2 1/4", but it still will bolt up fine. __________________ '97 T-bird LX 4.6L 2V, auto SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more No times yet

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03-19-2002, 05:38 PM	#2
esandes Registered Member Join Date: Mar 2002 Posts: 72	Stock V8 exhaust pipes are 2.5" I believe. Thats from the header to the tailpipes. You shouldn't have any problems with fit or flow going with aftermarket exhaust parts whether it's just the replacement of the stock H pipe or headers or the cat-back. For the best bang for the buck, replace the stock H pipe that has 3 cats per side and go with X pipes. The 99+ GT's have only 4 cats compared to our 6.