getdowndoyou

my setup is a knockoff t25/t28 turbo on 8psi on a built d16y5.my downpipe is only about 1 to 1.5 inches in diameter so im pretty sure its choking it because when i pop it off it spools quicker and harder.i went to the track for the first time and hit a 14.3 with no downpipe.my question is what size do you recomend for the downpipe?or do you know of anybody who makes a downpipe for a 1991 civic hatch dx other than greddy?and if so how much roughly? theres this damn srt4 lol that runs a mid 12 and i wanna smoke him real bad cuz im tired of hearing him go up and down the local strip

black98gsr-t

it needs to be aleast 2.5 to benefit the spool and topend power... i made my own dp to replace the stock greddy 2" which is really only 1 7/8 " inside diameter..
it made a noticeable inprovement with topend power.. a good muffler shop could make 1 ...

Schister66

the downstraw returns!! I saw a 1.5" DP...it was bad ***, but spool on a 14b was sick.....4000rpm on a D series to spool it....restrictive, i think not

Topdawgg

1.5 inch?

i have straws bigger then that...

2.5 at least for a turbo car