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High flow cats/ race pipe

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Old Oct 9, 2006 | 09:46 PM
  #21  
'VETTE PHASE's Avatar
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From: Powell TN
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I'm curious about this smell.

Are you standing behind the car and breathing or is it coming into the car while you are driving?

Do the cars that smell have a tune or just relying on the factory tune?

I have long tubes, no cats, x-pipe & Corsas with an LS1-edit street tune. I don't have any noticeable smell.
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Old Oct 9, 2006 | 10:30 PM
  #22  
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It is in the garage after I park...I don't smell it on the road driving
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Old Oct 10, 2006 | 01:35 AM
  #23  
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From: Ocean Springs MS
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Originally Posted by LowFlight
Or you can live in Olive Branch like me and not have to worry...I just am tired of the smell. Does anyone know the best place to buy...I don't want to get screwed
Yeah, I'm closing on a house down there at the end of the month. No more smog checks!!!, but I'll still keep the cats. Next time I get it tuned, I won't bother asking for an "emission friendly" tune. You might find something at Extreme Motorsports in Bartlett. I've heard some LS1 guys having good service there, so they may be able to get you some cats at a decent price.
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Old Oct 10, 2006 | 09:45 AM
  #24  
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Hi Fellas;

I upgraded to some Random Tech High Flow cats and deleted the pre-cats. As discussed earlier, my CEL came on. I took it up and had it turned off, but the tech said it will come back on after I turn the car off and on a few times. Furthermore, he told me that I would have to delete it out by a tuner. I do not have the smell though, and I could feel seat of the pants difference which is not normal for me. It also made it louder, which I also liked. It was a good upgrade in my opinion but the cats ran me about 5 bills vs the mid pipes which are cheaper. So I guess either way, you will not be legal.
Good Luck!
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Old Oct 10, 2006 | 09:52 AM
  #25  
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From: Jax Florida
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High flow cats make the same HP as no cats in most cases. The decision comes solely down to sound (and environmentally, if you care about that.)

Proof ---> http://www.vetteweb.com/tech/0501vet_long_tube_headers/

"By replacing the cats with off-road straight pipes on Ron's Z06, we inched the performance up slightly. That means that the Random Technologies high-flow cats absorbed less than 1 hp and essentially no torque."
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Old Oct 10, 2006 | 11:06 AM
  #26  
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Originally Posted by Ryan L
High flow cats make the same HP as no cats in most cases. The decision comes solely down to sound (and environmentally, if you care about that.)
Note, per AVB's post above, they do make a difference on turbo cars. I know most of the guys reading/writing in this thread are not turbocharged but it is worth noting nonetheless.

Personally, I do not like the smell/sound and am going back to Random Tech high flows. I'll just turn the boost up a pound or two to regain whatever the cats are costing me.
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