Can someone give me an idea as to which type of down pipe is the best: Open-neck or Twin-dump type and why. It's for a MY98 Impreza Turbo AWD 2000.

 

Hi,

Depends who you talk to. I have an open neck one at the moment and found it better than a closed neck version of the same downpipe.

I'm actually changing mine soon for MRT's design which has a flange built into the normal open neck design which keeps wastegate gases separate and feeds them in a bit further down the pipe than a conventional open neck.

I'll post up when I get it fitted to report if ther is any improvement. MRT tell me that it will flow significantly better than my existing Hayward and Scott 3" one. We'll soon see!

Cheers

Rich

 

ive recently fitted a magnex and the difference is unreal also the only noise increase is from the bb ,dp sounds the same as oe apart from the turbo spool up ,nice bit of kit imo

 

you won't be disappointed with the bpm td-38 downpipe.. gives excellent results.

one for sale here:
http://www.scoobynet.co.uk/bbs/threa...hreadID=188729

 

Thanks a lot for that guys.
Much appreciated.