3" to 2.5

[silviaziz]

Hey guys,

I am in the process of putting my exhaust together. I have an s14 SR going into an S13. I will be running a 3" elbow, down-pipe and test-pipe. Would it be o.k. to run a 2.5" BRM dual tip exhaust, or should I just keep it all 3" The reason I'm asking is because of fitment issues. I spoke with Greg, and I told him I liked how the BRM exhaust didn't seem to "hang low" like other exhausts on the S13 (like the HKS Hi-power). He let me know that with the 2.5" piping, I will have no hang but he wasn't sure about the 3".

What do you guys think? Will I lose power buy dropping in size or will the drop be better for low-end torque?

Do any of you have similar set-ups?

Thanks

[AZ89two4Tsx]

If you're under around lets say 300HP, 2.5" is fine. Unless you're making big numbers, 2.5" will be fine.

[Gabes13]

id personally go with the 3" but i don't care about how close it sits to the ground and what not.Im sure you wont even notice the difference in power between a 2 1/2 and a 3.

[AZ89two4Tsx]

Yeah 3" will be louder. But if you want something that's loud BRM is not for you.

[Steady_One_S13]

I'd go with the 3" exhaust pipe if you're going to put out more than 350 hp. You won't lose the hp vs the 2.5".

[silviaziz]

Thanks for the replies!

[ZOMG.SR20]

just don't mind replacing your turbo repeatedly because of the cyclone effect created by going from 3inches to 2.5

[maj Andres]

from the CEO of this website

I run a 3" DP to a 2.5" catback, with over 400 hp, no issues.