Size of my TBI Formulas exhaust? 2.25 or 2.5??
Thread Starter
Junior Member
Joined: Jan 2002
Posts: 71
Likes: 0
From: Akron Ohio
Size of my TBI Formulas exhaust? 2.25 or 2.5??
I could have posted this topic in the exhaust forum but I thought I would get a more acurate response here.
I have an '89 Formula with TBI. The exhaust (stock) was put on the car right before I bought it (including a new cat). I just bought an 80 series 2.5 inlet/outlet muffler and After looking at the crappy job the exhaust shop did, im gonna need a new intermidiate pipe. Dynomax has three different inermidiate pipes I can get:
47572- 2.25
46744- 2.5 89-91
46669- 2.5 86-89
I do not know which one to get. From looking at it, it looks like my cat is a 2.25 outlet, but I cant tell. Someone please tell me which on I need. Thanks
Ben
I have an '89 Formula with TBI. The exhaust (stock) was put on the car right before I bought it (including a new cat). I just bought an 80 series 2.5 inlet/outlet muffler and After looking at the crappy job the exhaust shop did, im gonna need a new intermidiate pipe. Dynomax has three different inermidiate pipes I can get:
47572- 2.25
46744- 2.5 89-91
46669- 2.5 86-89
I do not know which one to get. From looking at it, it looks like my cat is a 2.25 outlet, but I cant tell. Someone please tell me which on I need. Thanks
Ben
Supreme Member
Joined: Apr 2001
Posts: 1,342
Likes: 14
From: Dayton, O.
Car: 91 Camaro Z28
Engine: LS7
Transmission: M12/T56
Axle/Gears: 3.79
It should be the same as the camaro, which is 2.25". Honestly I'd just buy the Dynomax 3" cat-back, theres not much of a reason to bother with under 3".
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