I currently have a RS*R ex mag on my 1990 teg. Im also building a 2.0l vtec motor with 11.5:1 compression. How much of an improvement would I notice with a 2.5 over the 2.36? Would it be worth while to buy piping/resonator/muffler and have it welded up or should I just keep the RS*R and leave it at that?

The RS*R is pretty loud with a high flow cat as it has a pretty small resonator before the muffler. I'm thinking if I fab up a 2.5", I can get a huge resonator to quite it up a little bit.

Any input? Thanks.

 

you think the RSR exmag is loud??

are you sure you don't have the other (newer) RSR w/ the fart can?

My RSR (original) is really quiet

 

I have the exmag which isnt the fartcan one. With my header and high flow cat, it gets kinda loud at times.

 

this thread has alot of good info on 2.37 vs. 2.5 on the second page
https://honda-tech.com/zerothread?id=1444622
enjoy