Question on Exhaust manifold outlet size?

[Theeonlybatman]

I purchased and 2002 RT/10 almost a year ago and am finally ready to start the exhaust upgrade. But.... I have a couple of questions (since i dont have an owners or repair manual).

If i am replacing the stock cats and exhaust with high flow cats/no cats, and cat back exhaust.. leaving the stock manifolds in place.

Will a 3" system attach to the stock manifolds? or are they 2.5" also?

Asking for a little help as i cannot find this tech info anywhere.

Thank you in advance for your help.

 

[GTSHolgi]

Stock manifold pipe is 2,5" so you will need to create a transition to 3". Actually, I did the same as you are doing and I used the 3" HF cats as the transition from 2,5" to 3".

You must be registered for see images attach

BTW: Go and get the Service Manual