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cat converter

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Old May 12, 2002 | 08:14 PM
  #1  
jer4251's Avatar
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Joined: Sep 2001
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From: Richmond Hill, GA
Car: They all sit.
Engine: LS1, LB9, LB9, L98, LT1, LT4, LT4
Transmission: A4, T5, T5, A4, A4, T56, TR6060
cat converter

im just wondering if anyone knows if a straight pipe is better than having a high flow cat. i have a 92 3.1 and i cut the stock cat out and replaced the gap with a straight pipe. its nice this way but no matter what i do to my exhaust it still sounds like it has leaks, i put in aftermarket manifold gaskets. and my straight pipe is tight, i dont kow whats causing it
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Old May 13, 2002 | 10:50 PM
  #2  
kfoley's Avatar
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Joined: Jul 2001
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Yep, straight pipe will flow better than a hi flo cat any day.
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Old May 15, 2002 | 12:08 AM
  #3  
scpracing2000's Avatar
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Joined: Feb 2002
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From: Indiana
Hey i was wondering how you put the striaght pipe on. Did you put it on and clamp it or weld it? and one more questin. when you took the cat off how did you take it off?
Thanks
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Old May 15, 2002 | 10:08 AM
  #4  
kfoley's Avatar
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Just cut the cat off, it's usually easier that way rather than trying to mess with taking the bolts off and all. The best way to go is to weld it, but a clamp will do just fine as long as you make it tight.
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Old May 15, 2002 | 12:11 PM
  #5  
Motopsyco's Avatar
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From: Plainwell, Mi U.S.A.
Car: 89 firebird, 03 Avalanche z71
Engine: 5.0 stock (for now)
Transmission: 700R4 auto
Axle/Gears: stock 2.73 for now
i had a hard time taking off my cat, finally had to air hammer it apart, and it was only on there for 1 year, however, it didnt improve performance, because i was running open exhaust, and lost what little backpressure i had for bottom end torque, plus my car sounds like a tractor now
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