okay..

1. Stock Exhaust Setup (Stock Muffler, Mid-Pipe, Y-Pipe, Cats)
2. My Setup (Custom Muffler delete, Stock Mid-Pipe, Aftermarket Y-Pipe, Stock Cats)
3. New Setup (Custom Muffler delete, Stock Mid-Pipe, Aftermarket Y-Pipe, Test Pipes)

My question:
With my current setup I also have a short ram intake and crawford plenum, If I add the testpipes, do you think i'll be running too rich or lean?? Do you think this setup will be alright on my car? Thanks

I have an 04 5AT coupe.

tito-

 

The plan looks good to me. If you are concerned about lean or rich, have the car tested.

 

Nice diagrams.

VO(subscribing for answers/opinions)

 

I didn't know the stock exhaust had another resonator built into the y-pipe?

 

I don't remember it, but i think it's another flex joint thing

 

+1