I just lowered my h22 turbo in an EG and my downpipe is way too close to the ground. I have 3 inch exhaust and 3 inch downpipe. I am only lookign for 300whp at most. What kind, if any, bottleneck would i create with a 2.5 inch downpipe?

 

You could still make 300whp with the 2.5 inch downpipe but a full 3 inch exhaust system is optimal for your h22turbo setup. Maybe some custom fab. could do it?

 

how close is too close for the downpipe to be to the oilpan? or does it even matter?

 

I have 4 inches between my DP and the ground on my turbo EF B20. Ive only ever hit once and thats cause I was going way too fast over a dip in the road. BTW my car is not lowered at all. Stick with the 3in and see how that goes....

 

try to raise it up a bit crazy dumped will expletive up ur car!