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View Full Version : which downpipe?


sweetlou69
04-29-2005, 05:14 PM
ok ive got the sp2 system and im just wondering what downpipe should i go with?
low_psi
04-29-2005, 07:30 PM
GHL if you want a divorced wastegate path. MAM or Corksport if you want an open mouth design.
jurgs01
04-29-2005, 07:32 PM
GHL doesn't come with a flange, so you would have to get one welded on or get your SP2 flange cut off.
low_psi
04-29-2005, 07:35 PM
GHL doesn't come with a flange, so you would have to get one welded on or get your SP2 flange cut off.

Just the S-pipe does not, but the full downpipe has a flange that connects right up to any catback system.
Striker187
04-29-2005, 11:30 PM
i dunno if it would be the best to go from 3" piping down to 60mm piping. i'd prolly go with mam's downpipe+midpipe
sweetlou69
04-30-2005, 10:28 AM
what about the apexi 2.5 catless....any good....
geomatics_tech
04-30-2005, 12:35 PM
(jacked)

Sorry bout the jack, but is the s or j pipe that beneficial? Ive read many threads and none of them provide a proper answer. Im not looking for peak gains but more drivability improvements, will the s or j pipe help improve drivability or is the mid pipe the problem?

thanks
shaun (canada)
daedalus
04-30-2005, 01:00 PM
ditto on the GHL. Great DP and has flange for catback system.
goku4658
04-30-2005, 01:01 PM
ghl's always treated me good
FBI14
04-30-2005, 03:04 PM
GHL if you want a divorced wastegate path. MAM or Corksport if you want an open mouth design.

are there benefits or disadvantages for either design ?
RyanJayG
04-30-2005, 03:21 PM
the diverged path keeps the wastegate gasses from causing turbulence in the main exhaust flow. however, having a "split path" can be misleading, because if its not fairly long (the GHL's WG path is pretty short due to the msp's turbo location) then it doesn't do much of anything but add to the complexity of manufacturing.

but in all honesty, with protege's its not a huge deal, you need to REALLY push some boost for it to matter much.
FBI14
04-30-2005, 04:53 PM
the diverged path keeps the wastegate gasses from causing turbulence in the main exhaust flow. however, having a "split path" can be misleading, because if its not fairly long (the GHL's WG path is pretty short due to the msp's turbo location) then it doesn't do much of anything but add to the complexity of manufacturing.

but in all honesty, with protege's its not a huge deal, you need to REALLY push some boost for it to matter much.

thats good stuff thanks for the info

are you saying the design type as in one path or a diverted path wont make a huge deal or just a downpipe in general wont make that much differerence until you are pushing a lot of boost..is a lot of boost upwards of 12PSI ?
RyanJayG
04-30-2005, 07:56 PM
thats good stuff thanks for the info

are you saying the design type as in one path or a diverted path wont make a huge deal or just a downpipe in general wont make that much differerence until you are pushing a lot of boost..is a lot of boost upwards of 12PSI ?

the diverged path, especially a short one.

a s/down-pipe on the msp will make a pretty good difference. you'll deffinitely notice it.