Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: mechanized on December 13, 2006, 10:05:42 PM

Title: '87 cougar XR-7 exhaust
Post by: mechanized on December 13, 2006, 10:05:42 PM
Hello,

  I have an exhaust question. I have the H.O. 5.O conversion and up until now I have been using the stock '89 mustang cat h-pipe and no lers.  I bought a 2 1/2 X-pipe and some flowmasters that are for a mustang. Will I have to lengthen the "mid pipes" to fit the cougar body? It's the pipes that fit from the X-pipe to the lers. Thanks.
Title: '87 cougar XR-7 exhaust
Post by: vinnietbird on December 13, 2006, 10:24:59 PM
Yes,they'll have to be lengthened.Easy stuff for any mufler shop.i have the 2 1/2 inch X-pipe on my '88 T-Bird.Good choice.
Title: '87 cougar XR-7 exhaust
Post by: Ifixyawata on December 14, 2006, 07:19:40 AM
I hear this a lot, BUT, when I bought the 'mid-pipes' aka flowtubes separately from MAC Performance, they were actually almost too long on my car.  Perhaps these separate ones were made longer for a reason?
Title: '87 cougar XR-7 exhaust
Post by: mechanized on December 14, 2006, 08:08:36 PM
Okay, hopefully I'll get to doing this swap this weekend. If they are too short then I guess I can just cut the "mid-pipes" in half and splice in a piece of pipe and some clamps.  Should be a increase in power and sound.:cool:
Title: '87 cougar XR-7 exhaust
Post by: vinnietbird on December 14, 2006, 08:42:35 PM
The seperate midpipes are longer because they (the manufacturers) don't know what type of lers one is going to use.They sell the mid pipes pretty cheap.I had to add pipe because I was using my current lers and tailpipes aut replaced from the lers forward.
Title: '87 cougar XR-7 exhaust
Post by: thundr306 on December 14, 2006, 09:26:33 PM
If you are just going to run dumps, you will be fine without any modifications.
Jim
Title: '87 cougar XR-7 exhaust
Post by: 1WLD BRD on December 15, 2006, 05:03:47 AM
I had to add tips to my LX tailpipes on my '85 5.0L, but not lengthen the mid pipes, then again I had a cheap wrinkle bent replacement type exhaust on it at the time.:dunce: :pbb:  was doing all my mods on that thing on a really tight budget back then.