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stock cat diameter??

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Old Feb 9, 2005 | 12:04 AM
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Default stock cat diameter??

does anybody know the cat's stock diameter? the inlet and outlet?

thanks
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Old Feb 9, 2005 | 01:10 AM
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2.5" i believe
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Old Feb 9, 2005 | 05:42 AM
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If I had to bet on it, I would definitely say 2.5" as well, thats the width of the whole exhaust.
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Old Feb 9, 2005 | 07:30 AM
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I thought it was 2.25 at the cats...then it becomes 2.5 at the ypipe outlet. Not 100% sure on that though...
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Old Feb 9, 2005 | 09:55 AM
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anybody know 100%? thanks for the replies
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Old Feb 9, 2005 | 02:42 PM
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on second thought, 2.25 is the one

I am almost sure, like...C+ sure, 79.5%

sorry about changing my mind and all, I have had so much stuff to deal with lately, y'know?

But yeah, 2.25 is the correct answer.
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Old Feb 9, 2005 | 03:12 PM
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I would have to go with 2.25" as well. Alot of aftermarket testpipes are 2.25" so why would these aftermarket companies use a smaller exhaust than stock?
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Old Feb 9, 2005 | 08:26 PM
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With a dial caliper, this is for both ends

Measuring the outside pipe diameter 2 1/4"
Measuring the size of the flange on the inside 2 3/16"
Measuring the inside diameter of the inner pipe that sits just past the lip of that flange 2"

La Brae does have high flow cats that use 2 1/2" pipe diameters.
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Old Feb 9, 2005 | 09:10 PM
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Just so happeneds I got one behind my desk. got the ruler out and here is what a got.


interpipe diameter is a hair under 2"


PS our High flow cats with 2 1/2" piping will be out in the next 3 weeks!
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Old Feb 9, 2005 | 09:13 PM
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thanks for the replies!
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Old Feb 14, 2005 | 12:13 PM
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Moved.
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