Hiflow CATS?
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Junior Member
Joined: Aug 2004
Posts: 78
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From: Orange County, CA
Car: 89 Trans AM GTA
Engine: 5.7L
Hiflow CATS?
I was thinking about adding hiflow Cats to my 89 GTA. I already have the 3'' flowmaster exhaust but its from the CATS back. Would replacing the stock Cat's make a bid difference? If so, what kind of difference?
Thanks in advance for your advise
Thanks in advance for your advise
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
All cats are hi-flow today, they have what is called a monolythic core. The only way it would benefit you is if you change the manifolds to headers and a larger y-pipe.
Edit:
Forgot to mention...you really need to get rid if that y where the pipes join after the cats (really bad for performanve).
Edit:
Forgot to mention...you really need to get rid if that y where the pipes join after the cats (really bad for performanve).
Last edited by Dyno Don; Feb 9, 2005 at 08:58 PM.
Member
Joined: Jan 2005
Posts: 171
Likes: 0
From: Huntington Beach
Car: F-Bodys
Engine: 355
Transmission: shifting
If your cat on your car is stock then yes I would change it. You will notice a little more topend but your sound with deffinetly change for the better
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