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2 and 1/2 to 3" exhaust ?

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Old Mar 16, 2003 | 09:21 PM
  #1  
1987gt's Avatar
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From: poughkeepsie,new york
Car: 1989 GTA
Engine: 350 TPI (Many Mods)
Transmission: 700R4
2 and 1/2 to 3" exhaust ?

i have a 2 1/2" cat back on my gta right now im looking at buying a 3" intermidiate pipe and 3" tips.the guy at summit ses i can have the cat pipe made bigger to fit the 3" pipe and the intermidiate pipe and tips will fit over the 2 1/2 flowmaster muffler i have will this work?
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Old Mar 17, 2003 | 01:34 PM
  #2  
Ricktpi's Avatar
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From: Lower Salford, PA
Car: 1987 Camaro Z-28
Engine: 6.3L Victor EFI
Transmission: Tremec TKO 600
Axle/Gears: Moser 9"/4.11 Trac-Lok
Why would you go to all the trouble to do this? You do realize that wherever the exhaust is necked down to go through 2.5" it still will flow no better than the 2.5" pipe you already have. If you want to see a flow improvement go with 3" all the way back.
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Old Mar 17, 2003 | 02:38 PM
  #3  
Mark A Shields's Avatar
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Originally posted by Ricktpi
Why would you go to all the trouble to do this? You do realize that wherever the exhaust is necked down to go through 2.5" it still will flow no better than the 2.5" pipe you already have. If you want to see a flow improvement go with 3" all the way back.
Exactly, you're exhaust is only as good as the weakest spot.
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Old Mar 17, 2003 | 04:21 PM
  #4  
1987gt's Avatar
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From: poughkeepsie,new york
Car: 1989 GTA
Engine: 350 TPI (Many Mods)
Transmission: 700R4
yeah i kinda firgured that i guess i was trying to save money i want to put a new engine in soon and i didnt want to spend a 800.00 on a new exhaust. i think im gonna change the engine and just put headers on to my 2 1/2" system.
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