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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 10-01-2010, 10:28 AM   #1
Robbie1227
 
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Question Exhaust/CAT Question??

I am installing a Corsa Cat Back system on my SS-M6 and I was wondering:
What do Hi-flo cats do for performance?
Is there any HP gain?
Are they worth doing?
If so, what brand?
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Old 10-01-2010, 10:43 AM   #2
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High flow cats are worth it. If you do headers and exhaust go with high flow cats.......they are not near as restrictive as the stock ones.
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Old 10-01-2010, 10:51 AM   #3
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I am not doing headers at this point.
Are they still worth it?
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2010 Summit White Camaro 2SS/RS M6 LS3
Pfadt Sway Bars and Lowering Springs
Pedders Quiet OE adjustable end links
CAI with ADM Race Scoop
Corsa Cat Back Exhaust
Kooks 1 7/8" Jet Hot Coated LT headers and hi-flo cats
LSR Short Throw Shifter
Red Brembo Brakes, SSBrake lines, Castrol SRF, and Hawk HPS pads
Tuned by Torq (405 RWHP and 389 RWTQ)
Summit White GM GFX kit
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Old 10-01-2010, 11:13 AM   #4
gearhead440
 
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JBA high flows ~$400 from Maryland Speed
SOLO high flows ~$550

You will find several people have purchased both brands and are pleased with their results. The aftermarket CATs are less restrictive than the stock units.

If you decide to use headers later, you can sell the high flow CATs to help offset the header investment.

http://www.camaro5.com/forums/showthread.php?t=79075

http://www.camaro5.com/forums/showth...high+flow+cats

Attached a header vs stock manifold and CAT for comparison.
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Old 10-01-2010, 11:39 AM   #5
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forgive my ignorance, but are you saying I wouldn't need hi-flo cats with headers?
I am still learning.
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2010 Summit White Camaro 2SS/RS M6 LS3
Pfadt Sway Bars and Lowering Springs
Pedders Quiet OE adjustable end links
CAI with ADM Race Scoop
Corsa Cat Back Exhaust
Kooks 1 7/8" Jet Hot Coated LT headers and hi-flo cats
LSR Short Throw Shifter
Red Brembo Brakes, SSBrake lines, Castrol SRF, and Hawk HPS pads
Tuned by Torq (405 RWHP and 389 RWTQ)
Summit White GM GFX kit
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Old 10-01-2010, 12:50 PM   #6
BowlingSS
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Quote:
Originally Posted by Robbie1227 View Post
forgive my ignorance, but are you saying I wouldn't need hi-flo cats with headers?
I am still learning.
No, I think he is saying that you would need different hi-flow cats.

Bill
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Old 10-01-2010, 12:56 PM   #7
Robbie1227
 
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ok, got it now.
duh
thx
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2010 Summit White Camaro 2SS/RS M6 LS3
Pfadt Sway Bars and Lowering Springs
Pedders Quiet OE adjustable end links
CAI with ADM Race Scoop
Corsa Cat Back Exhaust
Kooks 1 7/8" Jet Hot Coated LT headers and hi-flo cats
LSR Short Throw Shifter
Red Brembo Brakes, SSBrake lines, Castrol SRF, and Hawk HPS pads
Tuned by Torq (405 RWHP and 389 RWTQ)
Summit White GM GFX kit
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