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350 or 454 manifolds

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Old Mar 15, 2001 | 09:50 PM
  #1  
buddman91rs's Avatar
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From: Niceville, Fl USA
350 or 454 manifolds

ok i dont want headers......too expensive right now(keywords:right now) what will either of th two get me in performance gains.....i know im not going to get the gains of the slp's or hooker's or whatevers.....can they even bolt up? will they keep low end torque? how loud will my exhaust be?


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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
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Old Mar 15, 2001 | 09:55 PM
  #2  
bird of spray's Avatar
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From: Reading, Pa
No. 454 is a big block
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Old Mar 15, 2001 | 11:05 PM
  #3  
Kevin91Z's Avatar
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Keep your stock exhaust manifolds until you can afford headers. Its not even worth the hassle of changing exhaust manifolds to put another set of manifolds back on.

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Old Mar 27, 2001 | 03:53 PM
  #4  
buddman91rs's Avatar
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the question is not the hassle, i enjoy working on the car(no matter how much of a hassle it is) i want to know if the 350 manifolds would flow more then stock.....

------------------
1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS
Reply
Old Mar 27, 2001 | 05:14 PM
  #5  
Kevin91Z's Avatar
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Well, you'd have to modify the y-pipe too, and you'd probably gain more there than you would from the manifolds.
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