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how much hp should i gain?

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Old Dec 16, 2004 | 05:31 PM
  #1  
MoroteZ28's Avatar
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Car: 1991 pontiac firebird
Engine: 305 V8 flo-pro exhaust
Transmission: automatic 700r4 4speed
Axle/Gears: stock 2.73's :(
how much hp should i gain?

hey watsup on sunday im goin to midas n getting the ravin 3inch dual exhaust n ii plan on throwin in there a high flow cat i have a goodwrench 350 n i kno they respond to mods great how much horsepower should i expect to gain with this?
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Old Dec 16, 2004 | 05:40 PM
  #2  
mw66nova's Avatar
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From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
upgrading from stock? i'd say about 20hp.
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Old Dec 18, 2004 | 07:59 AM
  #3  
MoroteZ28's Avatar
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Joined: Jun 2004
Posts: 445
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Car: 1991 pontiac firebird
Engine: 305 V8 flo-pro exhaust
Transmission: automatic 700r4 4speed
Axle/Gears: stock 2.73's :(
ok the ravin exhaust im gettin is 3 inch now how much more gain is this over a 2 1/4 or 2 1/2 inch exhaust?
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Old Dec 18, 2004 | 08:57 AM
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84firebird383's Avatar
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Posts: 608
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From: Oshkosh wi
Car: 77 Firebird
Engine: 454
Transmission: th350
Axle/Gears: 4.10
On a stock goodwrech 350. I don't think you will see more than 20hp gain, maybe less.Dual 3" is a little over kill on a stock 350.

Last edited by 84firebird383; Dec 18, 2004 at 09:00 AM.
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