EMk20a2

I am helping a friend of mine install his SLPlong tube header on his 2007 mustang GT, and am running into a bit of a problem. He has a Magnaflow cat back exhaust, and stock H-pipe. We are trying to install the header to this combination, but looking at it I really don't think thatthe long tube header was made to work with the stock H-pipe.I am thinking there are two ways to make that header work, modify the stock H-pipe by cutting out the catts and addingin an extension or buying the SLP X-pipe withtheir catts on it.Could someone please confirm that I am looking at this correctly??

The other question that I have isif we do need the X-pipe, how wellit work with the exhaust? The X-pipe looks as if it has a two bolt, type flange on the end that connects to the exhaust, but the Magnaflow exhaust is the slip in/clamp type fitment. Will we need to modify this to make it fit to the exhaust once we get the X-pipe???

Thanks in advance for the help

DOBERMAN

The longtubes will not work with the stock mid-pipe. The flange on the x-pipe is only used for the stock manifolds. Since you already have the headers get the short version of the x-pipe. It comes without the two extensions that hook to the manifolds and it clamps to the headers.

EMk20a2

Yeah I was going to get the shorter version, but the flange that I was talking about is shown on the exhaust end. His exhaust is a magniflow that is a slipin/clamp type. Here is the pic of it
http://www.americanmuscle.com/slp-mu...pipe-2005.html

DOBERMAN

That is the one you need. That picture is incorrect. You will use the clamps that connect the H-pipe to the over axle pipes. It doesn't matter what brand muffler.

EMk20a2

Ok that is what I was looking for, much thanks.

Black Sunshine 07

yeah you have to use the small x-pipe w/ SLP does make a matching version for their long tubes. i have ordered from american muscle and they were great. they even price matched for me. PLEASE post results after you guys get the long tubes on b/c i'm going all the way through my exhaust w/ SLP and am planning on getting their long tubes and x pipe. can't wait to hear about it. hurry!!

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WFdeac11

Same thing for me! I've got the xpipe and loudmouths on order, and i really want the longtubes but i can't fork over 800 bucks right now. I'm heading off to college in August and need to be saving, but who knows?? If the headerssoundTHATgood, then my books might just have to wait

desslok40

Here is a little taste of what it may sound like, of course I got MAC axlebacks !!

http://www.mustangexhaust.com/forums/local_stream.php?action=stream&id=379

DOBERMAN

They sound great. Not as loud as I was expecting but much deeper.