LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Do I need 2 cats?

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Old

Jul 9, 2004 | 01:29 AM

#1

camaro 22

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Joined: Dec 2001

Posts: 242

From: Pgh, Pa, USA

Do I need 2 cats?

I have a 97 camaro Rs vert. I just bought a wrecked 97 z28 hardtop for a v8 swap parts car I only have 1 cat now, and I know for the 97 z28 have 2. Would it benifit me to have 2 cat's?

Shawn

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Old

Jul 9, 2004 | 01:37 AM

#2

Somnambulist

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Joined: Apr 2004

Posts: 947

From: Texas

do you have emissions testing where you live? in other words, do they use an exhaust sniffer? If not, you'd benefit from having no cats...

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Old

Jul 9, 2004 | 09:04 AM

#3

truedualws6

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Joined: Jan 2004

Posts: 1,406

From: Downey, CA

Two 2.5" cats will flow better than one 3" cat. It just depends on
your budget. Note that the factory dual cats (96-97) are only 2.2"
or thereabouts.

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Old

Jul 9, 2004 | 11:28 AM

#4

Z28SORR

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Joined: Jul 2002

Posts: 3,768

From: Friendswood, TX, USA

Whether you use one or two is up to you, but I would not use the two factory CATS. The factory drivers side CAT is in the worst location and put gobs of heat into the engine compartment.

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