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Old Jun 21, 2006 | 10:49 PM
  #1  
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From: Pittsburg Kansas
Car: 1970 GMC LWB Street strip
Engine: 383 stroker
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exshaust?

Ok guys im here for performance (insnt everyone) and sound. I want a exshaust that does both the best possible. right now i got 2 1/2 catback flowmaster sounds good and performance, well i dont really know. would a 3 inch catback do better or dual 2 1/2???
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Old Jun 21, 2006 | 11:07 PM
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What engine do you have? Is it stock? If so, I would go with a 3" catback you think sounds the best. Sound clips are at the top of the page.
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Old Jun 21, 2006 | 11:54 PM
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From: Pittsburg Kansas
Car: 1970 GMC LWB Street strip
Engine: 383 stroker
Transmission: 350TH
Axle/Gears: 12 Bolt 4:11
motor

383 stroker approx 500 lift cam, aluminum heads 2.02 1.60 valves, carbed 750 holley.
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Old Jun 22, 2006 | 12:12 AM
  #4  
IROCThe5.7L's Avatar
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Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally Posted by 70gmc
383 stroker approx 500 lift cam, aluminum heads 2.02 1.60 valves, carbed 750 holley.

Oh geez, not so stock. You should for sure get a 3" exhaust. If I were you, I'd try to go with a brand that has a good flowing muffler for maximum horsepower. Look into mufflers like spintech, dynomax bullet, flowmaster 40 series (Not the 80 series).

But if you got money to throw around, you cannot beat a 2.5" dual system for sound and performance.
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Old Jun 22, 2006 | 12:14 AM
  #5  
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From: Pittsburg Kansas
Car: 1970 GMC LWB Street strip
Engine: 383 stroker
Transmission: 350TH
Axle/Gears: 12 Bolt 4:11
3 inch

3 inch catback or try 3 inch duals? Thanks
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Old Jun 22, 2006 | 01:49 AM
  #6  
IROCThe5.7L's Avatar
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Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Definitely 3" for a catback. Dual 2.5's should be more than enough flow for your setup.
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