Cat bypass on '84: Can you feel the HP difference?

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09-20-2008, 12:13 PM

jaimesy

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Location: San Francisco, CA. '84 US 928S; Auto; RauchQuartzMetallic. 60K miles

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Cat bypass on '84: Can you feel the HP difference?

Hi,
Am considering a cat bypass on an AUTOMATIC '84. Do you think I will actually feel the HP/Torque lift difference?

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09-20-2008, 12:43 PM

Fabio421

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You should feel a difference but you will surely hear the difference.

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09-20-2008, 02:06 PM

cold_beer839

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Take the cork outta the bottle and drink some ice cold horse power!!!

They run better and sound better.

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09-20-2008, 06:11 PM

mark kibort

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mine , was 12hp same gain as the 3.5" exhaust. net gain was 24hp for both exhaust and headers

mk

Last edited by mark kibort; 09-20-2008 at 08:13 PM.

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09-20-2008, 06:14 PM

LightStriker

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Just checked... And here it's a ticket of 2500$ if they find you changed in anyway your Cat.

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09-20-2008, 06:15 PM

Leslie 928 S2

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Hi Jaimesy,

Are you allowed to do that in California??? Thought that was the worst emissions control state in the country?

We put a couple of high flow, large cell shorty cats under mine, sounds great, and still smells like a cat car. Definite hp difference too, but really couldn't say how much. It still passes NJ emissions inspections...