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2 1/4" or 2 1/2". What would you go with???

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Old May 20, 2005 | 01:29 PM
  #1  
HawkeyeGT's Avatar
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From: Guetersloh, D
Car: 1982 Chevrolet Camaro Z28,
Engine: 5,0l
Transmission: TH 350
2 1/4" or 2 1/2". What would you go with???

Hey,
got an 1982 Z-28 305cui.
World Heads, Hooker Header, Weiand Action + mani, Comp Cams cam...
No I had to build the exhaust. Which diameter would you use?
2 1/2" or 2 1/4". I wanna go dual with H-Pipe between.
Thx
Hawk
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Old May 20, 2005 | 10:06 PM
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Air_Adam's Avatar
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
2.5".... why not?
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Old May 21, 2005 | 09:49 PM
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From: Davenport, Iowa
Car: Still a 3rd Gen
Engine: 450HP 355
Transmission: TH350
Axle/Gears: 9" with 4.11's
i went 2.25" on mine.. only becaue the muff shop said that 2.5" wouldn't bend tight enough for all the turns it had to make.... either way it stil out performs my old 3" single system by a landslide.


Go 2.5" tho.. Might as well
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Old May 22, 2005 | 08:43 AM
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Go with a single 3" if you can.
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Old May 23, 2005 | 01:09 PM
  #5  
HawkeyeGT's Avatar
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From: Guetersloh, D
Car: 1982 Chevrolet Camaro Z28,
Engine: 5,0l
Transmission: TH 350
Single 3"?!?
Hmm, I first thought about that, but now I bought me a H-Pipe, so now I think I go on dual 2,5".
So now the next questions....
H-Pipe, as near as possible to the headers, right?
But where to put the muffler? Near the Headers or near the end of the system? And how noisy is the car, when letting the first muffler away, and use only 2 Flowmaster dual/dual? Or what would you suggest. But keep in mind, I live in Germany, so not to loud .
I hope you unerstand what i'm tryin, to say
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Old May 23, 2005 | 01:26 PM
  #6  
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From: Guetersloh, D
Car: 1982 Chevrolet Camaro Z28,
Engine: 5,0l
Transmission: TH 350
Or go with dual in a dual/single and than between both a single 3" and in the next muffler single/dual. Do not find so much dual/dual's til now.
And I don't know if there is enough space for 2 single/single together. You know?

Oh, another question.... . wow i'm thinking too much.
I do not plan to lower the car, so would you put the new system the old way? passenger side and so one....
Or, to get the best results, straight under the floor, one left one right?

Last edited by HawkeyeGT; May 23, 2005 at 01:54 PM.
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Old May 23, 2005 | 06:55 PM
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From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
Dual exhaust....say goodbye to your ground clearance. Single 3" I believe has been proven to flow about the same as dual 2.5".... I'd have to agree with Shifty.
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Old May 24, 2005 | 12:45 AM
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From: Davenport, Iowa
Car: Still a 3rd Gen
Engine: 450HP 355
Transmission: TH350
Axle/Gears: 9" with 4.11's
Originally posted by Nixon1
Dual exhaust....say goodbye to your ground clearance. Single 3" I believe has been proven to flow about the same as dual 2.5".... I'd have to agree with Shifty.

altho true..True Duals sound soooo much better


i have 3-4" of clearance to the lowest point of my TD's. I would have more if i used the propper headers for the car
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Old May 24, 2005 | 10:16 AM
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Which Hooker headers are we talking about here?
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Old May 24, 2005 | 02:18 PM
  #10  
HawkeyeGT's Avatar
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From: Guetersloh, D
Car: 1982 Chevrolet Camaro Z28,
Engine: 5,0l
Transmission: TH 350
We're talking about Hooker 2460 Header.
Header Material: Steel
Header Finish: Painted
Header Style: Shorty
Primary Tube Diameter (in): 1 5/8
Collector Diameter (in): 3
Equal Length: No
Primary Tube Gauge: 16-gauge
Collector Attachment: Stock flange
Cylinder Head Port Shape: Oval
Flange Style: Standard
Flange Thickness (in): 5/16
Bolts/Studs Included: Yes
Gaskets Included: Yes
Reducers Included: No
Y-Pipe Included: No
Quantity: Sold as a pair.
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