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89' formula catback suggestions

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Old Jun 21, 2016 | 12:19 PM
  #1  
bigchief's Avatar
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Joined: Jun 2004
Posts: 741
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From: Long Island NY
Car: 1989 Firebird Formula
Engine: 5.7L 355 TPI
Transmission: 700 R4 with TCI rebuild kit and valve body mods
89' formula catback suggestions

I'm in the market for a new exhaust, right now I have:
edelbrock shorty's
edelbrock catback
3" straight pipe (instead of cat)

I'm happy the way the exhaust looks and sounds right now, but the catback is rusted. what do you guys suggest? Also, I'd be replacing the 3" straight pipe with a 3" electric cutout. Here are the options I'm seeing, but I'm not sure which will work with my 3" intermediate:

Dynomax
Magnaflow
Flowmaster

another note, I don't want huge pipes in the back.... ideally I'd like something close to stock (like my current edelbrock)
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Old Jun 21, 2016 | 01:23 PM
  #2  
Jatwood381's Avatar
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Joined: Aug 2014
Posts: 6
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Car: 86 Trans Am
Engine: 305TPI
Re: 89' formula catback suggestions

Flowmaster 3" cat back is good. Sounds great. Mine has 2.5" tailpipes
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Old Jun 21, 2016 | 02:15 PM
  #3  
bigchief's Avatar
Thread Starter
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Joined: Jun 2004
Posts: 741
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From: Long Island NY
Car: 1989 Firebird Formula
Engine: 5.7L 355 TPI
Transmission: 700 R4 with TCI rebuild kit and valve body mods
Re: 89' formula catback suggestions

does it come in sections with clamps? on summit, it looks like its all one piece?
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Old Jun 21, 2016 | 04:14 PM
  #4  
Jatwood381's Avatar
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Joined: Aug 2014
Posts: 6
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Car: 86 Trans Am
Engine: 305TPI
Re: 89' formula catback suggestions

Originally Posted by bigchief
does it come in sections with clamps? on summit, it looks like its all one piece?
Yes it comes in pieces so you can fit it in. The front long pipe, the piece that goes over the axle, then the muffler, then the two tail pipes. All separate. I recommend you toss the crush clamps and spend some money for exhaust band clamps. The don't crush the pipe and don't leak. They sell stepped clamps where i am at napa. Usually used on big rigs because they are always removing the stacks. Plus they are prettier
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Old Jun 22, 2016 | 07:37 AM
  #5  
bigchief's Avatar
Thread Starter
Senior Member
 
Joined: Jun 2004
Posts: 741
Likes: 1
From: Long Island NY
Car: 1989 Firebird Formula
Engine: 5.7L 355 TPI
Transmission: 700 R4 with TCI rebuild kit and valve body mods
Re: 89' formula catback suggestions

can I get the band clamps on summit as well? I'll take a look, thanks.

Does the magnaflow have the same size tips as the flowmaster? I would like something with smaller tips, closest to stock looking but still 3" intermediate
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Old Jun 22, 2016 | 12:01 PM
  #6  
naf's Avatar
naf
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Joined: May 2004
Posts: 5,338
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From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: 89' formula catback suggestions

https://www.thirdgen.org/forums/exha...3-catback.html

price the pieces from RA

I picked up a magnaflow muffler from Advance at a pretty decent price after 20% off.
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Old Jun 23, 2016 | 10:05 AM
  #7  
bigchief's Avatar
Thread Starter
Senior Member
 
Joined: Jun 2004
Posts: 741
Likes: 1
From: Long Island NY
Car: 1989 Firebird Formula
Engine: 5.7L 355 TPI
Transmission: 700 R4 with TCI rebuild kit and valve body mods
Re: 89' formula catback suggestions

i found the hooker headers quad tip exhaust on JEGS for around $350. anyone have experience with this? Looks like a one of the best deals for quad tips.
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