Direct fit Cat and Muffler sizes?
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Joined: Jun 2000
Posts: 2,937
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From: Moorpark
Car: 1991 CAMARO 1968 FIREBIRD
Engine: CAMARO 3.1L FIREBIRD 455
Transmission: CAMARO 700R4 FIREBIRD TH-400
I think its 2.25 I got my Cat from summit dynomax makes it and its a direct bolt in. i do not remeber if they asked me what size i needed or not.
Supreme Member
Joined: Jan 2001
Posts: 7,604
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From: ****SoCal, USA****
My direct fit is a Magno Flow 2 1/2" in & out, two way & I am using a direct fit for a 1993 3.4 F body.
My car is a 1985 & it seems all stock piping down there.
I just replaced mine couple weeks ago.
Last one used was also a direct fit for a 3.4 F Body.
I'd measure to be sure.
My car is a 1985 & it seems all stock piping down there.
I just replaced mine couple weeks ago.
Last one used was also a direct fit for a 3.4 F Body.
I'd measure to be sure.
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