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Old 08-22-2006, 10:05 AM   #1
John2.5RS
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Question DP options for twin scroll turbo?

I have a vf-37 turbo on my rs, I'm currently using the stock DP but I would like to find a better replacement. Non catted prefered, but I just need to know my options.
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Old 08-22-2006, 10:18 AM   #2
Hyper
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Zerosports, Prodrive, Scoobysport (I believe they make them in limited number), some other JDM brands...... all $$$ for being a brand and a rare item

I just bought a used helix catless DP for a good price, and we cut of the bellmouth section from my stock DP and welded it to helix then we put back all shielding and it looks like stock with the cat if you are looking from the engine bay!

I also bought the twin scroll flange (I still have it somewhere if you decide to go this way) that you can use with non-twin scroll downpipes, but that requires more custom work as you can't just cut n weld since twin scroll is a different shape and you have to extend the diameter of the bellmouth
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Old 08-22-2006, 12:25 PM   #3
John2.5RS
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The thing that I don't get is it's not a 'rare' Item in other countries. all overseas ver. 8 sti's came with the twin scroll IIRC.
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Old 08-22-2006, 12:44 PM   #4
Kostamojen
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Shipping them over here is what makes them rare...

Anyway, i'd just go custom if I were you, get the bellmouth section and use something else for piping.
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Old 08-22-2006, 01:19 PM   #5
John2.5RS
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The only problem is that I still would like to keep the stock catted DP on the side for emissions.
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Old 08-22-2006, 03:00 PM   #6
Kostamojen
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Ya, thats true, i'd keep the stock one as well...

See if another stock one pops up for sale too.
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Old 08-23-2006, 02:50 AM   #7
Hyper
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Quote:
Originally Posted by John2.5RS
all overseas ver. 8 sti's came with the twin scroll IIRC.

by ALL I assume you imply JDM, as EDMs never came with twin scroll

as for emissions.... aren't stock STI/WRX midpipes catted?
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Old 08-24-2006, 12:14 AM   #8
John2.5RS
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I only have one cat in the downpipe. no pre turbo cat.
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