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Which exhaust system on my 72 ??
#1
Hey guys, I'm new here and it's cool to have a forum like that. I'm french and just bought a 72 Mustang Grandé with 351 4V CJ engine.
I need a new exhaust system because the one installed is leaking and was strangely built.
I heard from Pypes, Magnaflow, Flowmaster etc. but I'm a bit lost. I need something that is street legal and prefer stainless exhausts for longevity.

Are there some great stainless exhaust systems that are ready to mount for my 72 ? Where to get the best deals ?
Thanks a lot !
  Reply
#2
Welcome to our forum! I think you might bethefirst guy from France.

I don't know of a turn key stainless system for our cars...but there may be one out there. How much rumble/ loudness are you looking for?

[Image: 386_07_10_13_5_58_42.jpeg]
My Mustangs:
71 M-code Mach 1, Medium Blue/White Sport, 4R70W, 3L50, Factory Ram Air.
72 Q-code Mach 1, Pewter/Black Sport, 4-spd, 3L25.
73 F-code Convertible, Planned: color TBD/Black top/White Int., 351C, 5-spd, 3L50.
65 Convertible, Britney Blue/White/White, more modified than original.
05 Convertible, Legend Lime/Tan/Tan, future classic??
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#3
Hey thanks, 1st from France whoaa Smile

I need something loud but not too much, something that sounds like a V8 muscle car Smile
What do you guys use ? Just saw Pypes, Magnaflow and Flowmaster systems on ebay that look great.

I also need to know the diameter of the original exhaust manifold output before I order. I guess it's 2 or 2,5 inches on my 351C but not sure, if someone can confirm that...
  Reply
#4
The stainless steel magnaflow kit for 67-70 will work. Head pipes will need to be "tweaked".

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
  Reply
#5
Okay I'm going to check them out Smile How do you tweak the head pipes ? Do you have a picture ?
  Reply
#6
All of the vendors mentioned will have an H pipe and mufflers that will work. The problem is finding tail pipes that will work with the staggered shocks and rear sway bar bar that should be on the car if it originally came with the 351c CJ engine (competition suspension). I know from experience the Flowmaster tailpipes require major rework (cut into two pieces, trimmed, re-bent, and welded together). Magnaflow does not list anything for 71-73 and their 70 listing says excluding staggered shocks. Pypes does not mention the staggered shocks at all. You might consider http://www.mustangbarn.com part number G07289 or G07288. Also National Parts Depot part number 5210-28B. None of these sysytems are stainless steel. They are aluminized steel (coated). Good Luck, Chuck
  Reply
#7
I took mine down to a exhaust shop where they custom bent new pipes to fit. Are there such shops in France? I went with 'glass packs' but I just like the old school sound.

'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
  Reply
#8
A proper response probably hinges on a couple of variables. Specifically, your ultimate goals for your Mustang and whether or not you want to keep it "stock."

Keep in mind that from a "performance" perspective, i.e., quicker response, better gas mileage, etc., the stock-type system is not necessarily the "best" option.

Over the years, as a Modifier, I have always spent a lot of time (and capital) on ensuring that I have the best exhaust system possible for my intended goal, which has been a very high level of performance. With that in mind, I gear the size of my pipes to the HP I intend on building in the motor. I match the headers and mufflers to that "number" and try to have no (or little) restriction. I take care of that by taking it to a custom shop and having the exhaust pipes bent professionally.

Now, if you are looking for something stock, just about any of the manufacturers you mentioned can supply you with the mufflers. Match your pipe size with those, take it to a good shop and let them bend up the pipes and install the system.

In the end, you generally "get what you pay for."

Just my .02.

BT

Do the RIGHT thing.
  Reply
#9
I bought a "complete system" from CJ Pony Parts....I was way less than happy with it.
  Reply
#10
c9zx;32934 Wrote:All of the vendors mentioned will have an H pipe and mufflers that will work. The problem is finding tail pipes that will work with the staggered shocks and rear sway bar bar that should be on the car if it originally came with the 351c CJ engine (competition suspension). I know from experience the Flowmaster tailpipes require major rework (cut into two pieces, trimmed, re-bent, and welded together). Magnaflow does not list anything for 71-73 and their 70 listing says excluding staggered shocks. Pypes does not mention the staggered shocks at all. You might consider http://www.mustangbarn.com part number G07289 or G07288. Also National Parts Depot part number 5210-28B. None of these sysytems are stainless steel. They are aluminized steel (coated). Good Luck, Chuck

When I saw Grandé I was not thinking in terms of a comp suspension.

Sly do you have staggered shocks and a sway bar at the rear?

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
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