could u use 2 1/4 inch piping with a 2 1/2 exhaust on a gsr on boost.
im only going ot u se it like that for a weekor 2.

 

Yeah it would work but it would choke off your setup significantly. I don't really see the point of fabbing it up. If you are only going to use it for a week or two, why not just run the bitch open downpipe until you get that 3 inch exhaust made?! Be cost effective! Just my $.02

 

Open dp imo...that's what I did in my old car before getting to exhaust shop.

 

the only thing bout open down pipe is that its loud as hell

 

For a week or two, i think i'd rather deal with the noise rather than spending money for an exhaust that's virtually useless. I ran open dp on my first setup for like 3 weeks and on my second setup for another 2 weeks....eventually you just get used to it.

Save your money and get 3" the first time....

 

the thing is my car already has 2 1/4 piping with a 2 1/2 exhaust on it. thast y i was akign if i could use it till i put the 3 inch

 

is it worth a noise ticket ?

 

If you can drive responsibly, you wont get a noise ticket...

 

so would the piping size matter?