View Profile: borlarex88 - ClubWRX Forum - Subaru Impreza WRX and STi Community and Forums
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    It's just the type of downpipe. There are two kinds: Bellmouth and Divorced Wastegate. Basically, there is a piece of metal that completely seals off the internal wastegate from the exhaust side of the turbo. It dumps back into the downpipe about 1/2 way down.

    Divorced Wastegate DP:

    Regular bellmouth DP:
  2. View Conversation
    It's really all based on personal preference with the DP. I've heard pro's and con's to each. Unless the divorced wastegate DP actually COMPLETELY separates the turbine wheel from the wastegate arm, then it's really not practical. I've also jut been told by my tuner that he prefers bellmouth over divorced. The car is currently inspected, but it doesn't need inspection until...I think March? May? Something like that. But it's just nice to know that I don't have to worry about it for a while. A long while I don't really know of any "good" place to take it. Sorry
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    Yes, there is a test where they hook a probe up to your car and it literally "sniffs" your exhaust. In Virginia, though, they DO NOT do this test woohoo! I think you will be okay catless. It also depends, IMO, where you go. Usually, the hole-in-the-wall type shops don't really seem to care as much. If you are too worried about emissions though, just go for the catted DP. Also, I would go for a bellmouth instead of the divorced wastegate. Just my .02.
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    Ah, I see, nice to meet ya! Well, right now I'll pass the visual inspection. I have a catless DP w/ a STi catback (w/ the cats gutted out of it). Even though it is "catless" it still appears to be stock. Haven't had any problems with it. In Virginia, they don't do the "sniffer" test otherwise I'd be screwed haha. But right now, I go to school in NC so I have this thing that I do where I can get a sort of, "pass" for I think up to 6 months until I am back in the state to get my emissions checked which is kinda nice
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About borlarex88

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About borlarex88
Your Vehicle(s):
2004 Subaru WRX Sedan
Vienna, VA
Estimated HP:
240 whp
Engine/Transmission mods:
Borla Cat-back Exhaust, Cobb Catted Downpipe, Cobb Accessport V2, Hyperflow Intercooler, Go Fast Bits Blow-off Valve, Perrin intercooler hoses, short-shifter kit
Suspension/Wheels mods:
18' Rota Tarmac IIs, Kumho all seasons
10' Alpine Type-R Sub, Alpine 800W 1 channel amp, Alpine 100W 4-channel amp, Alpine head unit w/ ipod cable and sync, Viper alarm system
Future plans:
Grimmspeed Uppipe, Deadbolt Super 16g w/ supporting mods eventually
Your Name:
Andrew Fuchs


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10-27-2008 06:11 PM
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07-06-2009 10:00 PM
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