A/market shorty headers

[ahbt7]

Can anyone tell me what shorty headers & h-pipe will bolt on to an 03 mm without fabrication? 03 cobra,mach1 etc? I will have a muffler shop replace from there back. Also, thoughts on mufflers. flowmasters, magna flow, borla etc.... I think I will keep my factory tips for now. thanks

[ImpalaSlayer]

Can anyone tell me what shorty headers & h-pipe will bolt on to an 03 mm without fabrication? 03 cobra,mach1 etc? I will have a muffler shop replace from there back. Also, thoughts on mufflers. flowmasters, magna flow, borla etc.... I think I will keep my factory tips for now. thanks

to my understanding, there are no shortys made specifically for the mm.

[fastblackmerc]

There are none. All require fabrication.

[Glenn]

The FRPP '03 Cobra shorty headers will fit with some work on the EGR tube. Get the ceramic coated ones - mine still look new after 4 years. They will also bolt right up with the Magnaflow hi-flow CAT X-pipe (93335) - two rear CATS only. X-pipe is 2 1/2" - so it will require a little work to hook it up with your OEM mufllers or ?. Also, the X-pipe needs to be extended ablout 4" to fit the longer WB MM.

There are many, many posts on the subject in the archives.

Glenn :beer:

[RR|Suki]

Can anyone tell me what shorty headers & h-pipe will bolt on to an 03 mm without fabrication? 03 cobra,mach1 etc? I will have a muffler shop replace from there back. Also, thoughts on mufflers. flowmasters, magna flow, borla etc.... I think I will keep my factory tips for now. thanks

"Without fabrication" isn't gonna happen, that's just the way it goes. With a little work though there are a number of options. For mufflers... if you are just looking for something that sounds pretty good flowmasters are a good buy... but if you want something that flows well, flowmasters are a bad choice. Dynomax has flow bench numbers for a few different cans on their site.
When it comes to headers the world is your oyster with a little effort. I personally have Longtubes out of a Mach 1 with 1 3/4" primaries and 3" collectors, something that in theory shouldn't fit, but with a little persuasion has gone quite well.

[ahbt7]

are the frpp 03 cobra headers the closest fit? how much work will be needed on egr tube?

[bigmerc'03]

i have them and there great but u will have to find a shop with the know how

[FordNut]

Another subject that has been beat to death here.

You need to put a 1/4" shim under the driver's side motor mount.
The H (or X) pipe will have to be cut and extended about 4" to clear the crossmember.
There is an adapter fitting that is needed to fit the EGR tube.
Maybe a little adjusting (bending) of the EGR tube.
Custom pipes between mufflers and H (or X) pipe.

Search the forums and you should find the part # for the fitting posted here somewhere.

[ahbt7]

thanks for the info!

[fastblackmerc]

I added the shim to both sides.

[Adam12]

what mach1 long tubes did you use and what persuasion was needed?