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I'm getting ready to purchase a complete Magnaflow system (header back). The kit is for a mustang and nobody can tell me if it will work on a cougar. I know my cat is a little longer, but is the clearance over the rear axle the same? Are there any other kits out there for a 67/68 cougar?
 

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1969 Mustang: Wheelbase 108" Overall Length 187.4
1967/1968 Cougar: Wheelbase 111" Overall Length 190.3

If we can make up those three inches before the axle, we should be okay. That's why I was thinking about going for the longer mufflers. Also, I'm interested in making it as quiet as possible. Right now, I'm running 2.5" straight pipe to glasspacks, turned down before the rear axle. No H-pipe.
 

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If you are trying to keep the car "as quiet as possible", then why are you looking at magnaflows? I have that exact set up, only with locally bent pipes. You should be able to find somebody locally that could bend it up for you, rather than a mail order special, and then you know you will have the right length...
Here's an audio clip...
http://s819.photobucket.com/albums/zz114/woodsnake4462838/?action=view&current=gracecar013.mp4

If you want "quiet" I would think a pair of turbo mufflers, or similar would be better. Don't get me wrong, I love my magnaflows, but they aren't necessarily quiet...
 

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I have dual 2.5's on my 68 with some Magnaflows... not a kit, just done at the local shop from the headers back for $300 bucks. It is not LOUD, but it is far from being QUIET. If you want it as quiet as possible, you need some packed turbos or something. Mine is louder with Magnaflows than with triple chamber (50 series?) Flowmasters...
 

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I installed the Pypes no muffler kit SFM03 that ahunt described. I am happy with the fit, the tail pipes end near the valance. I can can snap a pic if you like.
 

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Sounds like fast to me Wood.
 

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Woodsnake, that sounds perfect. Compared to other performance mufflers, Magnaflows are on the quiet end of the spectrum. It's not like I want my Cougar to sound like a Prius, but what I've got right now is ridiculous. There is one good local shop around where I live, but they aren't cheap. Also, I like to do as much as I can myself.

Ken, I would love to see the Pypes setup. What are the dimensions of the mufflers you used?
 

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View attachment 25845 View attachment 25844 View attachment 25842
I temporarily attached the valance to see where they end up. The muffler is 14.5" about 18" total with the connecting pipes. (Hooker Aerochamber)
The headers are Hooker comps. You can see the left is a bit past the valance, the right is right at, due to the extra bend on that side.
Hope this helps.
 

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I don't think I could find a local muffler guy to bend up a set of stainless pipes like that for ~$250. Did it come with hangers and clamps?
 

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Here's the muffler comparison I've seen quoted and requoted.

http://www.mustang50magazine.com/techarticles/m5lp_0212_ford_mustang_muffler_comparison_test/index.html

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All tests via an independent lab
All tests @ 15” wc

2 “ Straight Pipe 283 CFM
2 ¼ “ Straight Pipe 365 CFM
2 ½ “ Straight Pipe 521 CFM

2 ¼” Typical Bent tailpipe 268 CFM
2 ½” Typical Bent Tailpipe 417 CFM

2 ¼” Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 ¼” Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 ¼” Cherry Bomb 239 CFM
2 ½” Cherry Bomb 294 CFM

2 ½” Inlet/Outlet Dynomax Super Turbo 278 CFM
2 ½” Inlet/Outlet Ultraflow Bullet 512 CFM
2 ½” Inlet/Outlet Gibson Superflow 267 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 ½” Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 ¼” Inlet/Outlet Thrush CVX 260 CFM
2 ½” Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 ½” Inlet/Outlet Hooker Aero Chamber 324 CFM
2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM

Standard OEM 2 ¼” Inlet/Outlet 138-152 CFM
Standard OEM 2 ½” Inlet/Outlet 161-197 CFM
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This next comparison I found on a mustang forum.
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The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq

Sound Off in Quietest to Loudest (Decibels):

1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
http://forums.stangnet.com/archive/index.php/t-392314
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The Pypes kit came with hangers and clamps, but i bought band clamps in case I wanted to switch mufflers.
 

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Discussion Starter #14
Woof! Thats a bunch of good info. I think i will go with the magnaflow kit and see what happens. With 400hp & 380tq i should be rockin & sound good too. Thanks to all!
 

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Do you have a 400 HP engine?
 

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Discussion Starter #16
yeh it should be.Just a 302 but its got Big patriot heads, air gap w/650 carb, flat tops and a healthy cam----- its more than i planed on. Was going to keep this one mild and go for a 408 in a couple years...... all the goodies just kindu fell into place. Thats what i tell my wife too.
 

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Discussion Starter #17
yeh it should be. Big Patriot heads, air gap w/650 carb, flat tops & a healthy cam----- not the mild daily driver i intended. The parts Just kind of all appeared. At least thats what i tell my wife.
 

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Nope Hampus - again I think you will come up short. Not that you cold make up the difference - but if your going new - why not have a shop custom bend it for you.....gotta be some good muffler shops in Germany. By the time you pay shipping......it's gotta be cheaper to get custom.
 
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