Thread: 3" downpipe pro's/cons worth it?

I have been thinking about going from a 3" dp on my t25 with s4's? My exhaust is all 3 inch except for the dp. I know a t25 creates a lot of back pressure. I also heard a 3" dp can rub against the cross member and also scrape the ground. Also would I see any hp gains? Any suggest would be great.

If done right it will not

never heard crossmember but, if your car is super low it will hit. Also I hear sway bar, mine does on that.

Lou,

Our cars are roughly the same stance, and I don't have ground issues with mine, unless I'm going into a fuucked up driveway. 3" is fine as far as clearance.

Oh yeah, and doesn't hit the xmember either.

so 3" dp will go below the crossmember?

most likely, but just a bit

we need air ride!!

Mine doesn't scrape at all with the hypercos.

it runs right next to the crossmember and it wont rub if the installer knows his craft.

I run a 3 inch on my T28 no clerance issues at all.

I ran a 3" turbo back on my T3 setup, it ran next to the crossmember, and I had no ground clearance issues, but the top of the downpipe was about 1/2 an inch from the oil pan. you should be fine witha 3" inch downpipe. Im going through the same thing right now on my T25 setup, my downpipe is 2 1/2 while the rest is 3" no cat no resonator