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Mufflex Exhaust

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Old Jul 28, 2016 | 10:55 AM
  #1  
jsr1485's Avatar
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From: Delaware 19973
Car: GMC 2500 HD, 1990 GTA
Engine: 383 SBC
Transmission: Turbo 400
Axle/Gears: 12 bolt 4.56
Mufflex Exhaust

Anybody run this on a Drag Car? I need to change my setup for next year and was trying look for some set up's
Let me know hat you guys run
Attached Thumbnails Mufflex Exhaust-bird-071.jpg  
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Old Jul 28, 2016 | 05:28 PM
  #2  
84 z28's Avatar
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From: Rochester NY
Car: 1984 z28
Engine: 355
Transmission: 700r4
Axle/Gears: Moser 9" 4.11
Re: Mufflex Exhaust

4" with magnaflow race muffler here, Only pita I had was making my own y pipe to clear my umi crossmember and used a flowmaster scavenger series y collector to get the 2 to connect
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Old Jul 28, 2016 | 07:53 PM
  #3  
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From: California, MD
Car: 88 Camaro
Engine: 383
Transmission: T5
Axle/Gears: Moser 9 inch/4.11 TruTrac
Re: Mufflex Exhaust

Originally Posted by 84 z28
4" with magnaflow race muffler here, Only pita I had was making my own y pipe to clear my umi crossmember and used a flowmaster scavenger series y collector to get the 2 to connect
I'm doing that very thing right now. Same system and setup.
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Old Jul 28, 2016 | 08:05 PM
  #4  
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From: Rochester NY
Car: 1984 z28
Engine: 355
Transmission: 700r4
Axle/Gears: Moser 9" 4.11
Re: Mufflex Exhaust

Originally Posted by Tony V
I'm doing that very thing right now. Same system and setup.
There's no good way around my the umi relocation crossmember, Small section of the exhaust hangs lower than i would like but it is what it is
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Old Jul 29, 2016 | 08:49 AM
  #5  
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From: GA
Car: 88 Trans Am GTA
Engine: 350
Transmission: 700R4
Axle/Gears: 12 bolt 3.73
Re: Mufflex Exhaust

Get a hawk sinister and pick your muffler. Way cheaper going that route versus the mufflex. I did the sinister on 2 cars, stuck a magnaflow on one and dynomax ultraflow on the other.
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Old Jul 29, 2016 | 11:14 AM
  #6  
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Car: 87 TA clone
Engine: 70/70 Turbo 5.3 LS
Transmission: bullet proof 2004R
Axle/Gears: ford 8.8, 3.55 gears
Re: Mufflex Exhaust

Made my own 4" catback with dual mufflers for less than $250. 4" hooker aerochamber and 4" dynomax ultra SS. Take away the dynomax or the aerochamber and save $70 so less than $200 for a mandrel 4" catback with SS band clamps.

All you need is a 4' section of 4" pipe, 4" 60* bend, three 90* bends with slip fit connections at $25 a pop. No welding, figure out your hangers and your all done. the cost of the sinister/mufflex kits are insane.
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Old Aug 1, 2016 | 10:53 AM
  #7  
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Car: 88 Camaro
Engine: 383
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Axle/Gears: Moser 9 inch/4.11 TruTrac
Re: Mufflex Exhaust

My set up.
Attached Thumbnails Mufflex Exhaust-20160729_183506.jpg   Mufflex Exhaust-20160729_182908.jpg   Mufflex Exhaust-20160729_182559.jpg  
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Old Aug 1, 2016 | 04:15 PM
  #8  
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From: MA
Car: 1989 IrocZ
Engine: 421 Dart Stroker
Transmission: 4L60E Cahall Performance Built
Axle/Gears: Midwest Chassis Fab 9/ 3.55 gears
Re: Mufflex Exhaust

Originally Posted by customblackbird
Made my own 4" catback with dual mufflers for less than $250. 4" hooker aerochamber and 4" dynomax ultra SS. Take away the dynomax or the aerochamber and save $70 so less than $200 for a mandrel 4" catback with SS band clamps.

All you need is a 4' section of 4" pipe, 4" 60* bend, three 90* bends with slip fit connections at $25 a pop. No welding, figure out your hangers and your all done. the cost of the sinister/mufflex kits are insane.
Id like to see that. Sound nice for that price.
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Old Aug 1, 2016 | 10:16 PM
  #9  
customblackbird's Avatar
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Engine: 70/70 Turbo 5.3 LS
Transmission: bullet proof 2004R
Axle/Gears: ford 8.8, 3.55 gears
Re: Mufflex Exhaust

I just sold it to a member on Saturday. I had about $250 in the catback, 4" mandrel aluminized tubing. and nice walker SS torqtite band clamps.

Heres the for sale thread with pics.https://www.thirdgen.org/forums/engi...-mufflers.html

It was a nice sounding exhaust but not tame enough for a DD style car. And I got a tone more ground clearance that Tony V's.
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Old Aug 2, 2016 | 05:10 PM
  #10  
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From: Rochester NY
Car: 1984 z28
Engine: 355
Transmission: 700r4
Axle/Gears: Moser 9" 4.11
Re: Mufflex Exhaust

Are you using the stock trans mount ?


Originally Posted by customblackbird
I just sold it to a member on Saturday. I had about $250 in the catback, 4" mandrel aluminized tubing. and nice walker SS torqtite band clamps.

Heres the for sale thread with pics.https://www.thirdgen.org/forums/engi...-mufflers.html

It was a nice sounding exhaust but not tame enough for a DD style car. And I got a tone more ground clearance that Tony V's.
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Old Aug 2, 2016 | 06:00 PM
  #11  
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Car: 87 TA clone
Engine: 70/70 Turbo 5.3 LS
Transmission: bullet proof 2004R
Axle/Gears: ford 8.8, 3.55 gears
Re: Mufflex Exhaust

Originally Posted by 84 z28
Are you using the stock trans mount ?
Poly trans mount but I run a 2004R trans and the crossmenber I made. It's a lot like the T56 style from Hawks if you ever saw it. As the 2004R mount is further back like a manual trans.
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Old Aug 2, 2016 | 07:13 PM
  #12  
84 z28's Avatar
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From: Rochester NY
Car: 1984 z28
Engine: 355
Transmission: 700r4
Axle/Gears: Moser 9" 4.11
Re: Mufflex Exhaust

Originally Posted by customblackbird
Poly trans mount but I run a 2004R trans and the crossmenber I made. It's a lot like the T56 style from Hawks if you ever saw it. As the 2004R mount is further back like a manual trans.
That's where you get your good ground clearance from under the cross member, If you had a UMI torque arm relocation cross member like me and Tony your ground clearance would be just like ours. Try routing exhaust around one of those and get back to me
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Old Aug 2, 2016 | 09:00 PM
  #13  
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Car: 87 TA clone
Engine: 70/70 Turbo 5.3 LS
Transmission: bullet proof 2004R
Axle/Gears: ford 8.8, 3.55 gears
Re: Mufflex Exhaust

Originally Posted by 84 z28
That's where you get your good ground clearance from under the cross member, If you had a UMI torque arm relocation cross member like me and Tony your ground clearance would be just like ours. Try routing exhaust around one of those and get back to me
Been their and done that. But looking at your clearances you might want to follow suit.
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Old Aug 6, 2016 | 09:37 PM
  #14  
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From: Wisconsin
Car: 1992 Z28 Camaro w/70k
Engine: 427 w/4" Mufflex Exhaust
Transmission: 700R4 3500 stall
Axle/Gears: 4.10:1
Re: Mufflex Exhaust

I am running the 4" mufflex system, w/magnaflow muffler. Had a small problem with clearance under my factory crossmember for the 700r4 but with a couple of notches and welds here and there, I got it up. Dropped a full second off my 1/4 mile.




Long pipe



Front to back



Tailpipe



crossmember notch 1
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