Hi-Flow Cats

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Mar 18, 2002 | 10:38 AM

blkvette01

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Intermediate

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Hi-Flow Cats

Rather than replacing your cat-back exhaust, anyone just replaced their cats with hi-flow types to improve horses? An off-road X would solve this, but I'd like to stay emissions legal. Any thoughts?

Mar 18, 2002 | 05:16 PM

blkvette01

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Intermediate

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Re: Hi-Flow Cats (blkvette01)

Anybody? :)

Mar 18, 2002 | 06:53 PM

SilverStar

Burning Brakes

Joined: Feb 2000

Posts: 1,247

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From: Denver CO

Re: Hi-Flow Cats (blkvette01)

Yes, I replaced my cats with Random Technology hi flow cats; they have the best flow rating of all the manufacturers. I have no before/after numbers to substantiate by opinion, however, SOTP meter read zero for this mod.

Mar 18, 2002 | 09:10 PM

MelloYellow

Le Mans Master

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Re: Hi-Flow Cats (SilverStar)

I'd say you pick up 5-8 rwtq.

I prefer C&L Hi-Flows. 450cfm ea if I recall on the 2.5". $89 each.

Mar 18, 2002 | 11:12 PM

Brutus0725

Pro

Joined: Sep 2000

Posts: 535

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From: Houston TX

Re: Hi-Flow Cats (MelloYellow)

MelloYellow,

Where can you buy the C&L Hi-Flow cats.

thanks.

Mar 18, 2002 | 11:41 PM

MelloYellow

Le Mans Master

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Re: Hi-Flow Cats (Brutus0725)

Heya,

Looks like they are $85 each. You'll want the 2.5" SD's. 3" are hard to fit and unnecessary with the muffler restrictions.
http://www.cnlperformance.com/cats.html

w/o Air
http://www.cnlperformance.com/graphics/25.jpg

[Modified by MelloYellow, 10:41 PM 3/18/2002]

Mar 18, 2002 | 11:58 PM

C5 Tweaker

Racer

Joined: May 2000

Posts: 405

Likes: 1

From: Dallas

Re: Hi-Flow Cats (blkvette01)

Cat removal on a 425 RWHP car netted a total of ~5 HP (and some resonance). Unless they are plugged, it may be a poor value mod.

Mar 19, 2002 | 01:31 AM

0Sales@MVPAutoParts.com

Former Vendor

Joined: Nov 2000

Posts: 5,607

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From: Houston TX

Re: Hi-Flow Cats (blkvette01)

TorchedTexan picked up approximately ~15-20 RWHP/TQ under the curve. But of course you won't see this if you just compare peak numbers.

The off road x-pipe is next on my list, as soon as I can find a "friendly" inspection station. And of course I will only drive it "off-road" only :D

-Tuan