Loren

twin scroll legacy?

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Yes. Most (all?) BP/BL Legacys are twinscroll. I have a set of the headers off one in my garage. The headers are slightly lower diameter than the STI ones, and have a different flange at both ends of the uppipe.

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4th gen onwards are twin scroll. Smaller extractors than the sti ones though.

Legacy twin scroll headers are what's on my car.

Sent from my SM-G960F using Tapatalk

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Gen 4 2.0L turbo Legacies are all twin-scroll turbo

38mm headers vs Impreza 42mm

Different flange and up-pipe bracket iirc

Prone to running bearings and turbos

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12 minutes ago, RaKid said:

Prone to running bearings and turbos

vf38 are the ones that crap out a lot, TD04 twin scroll variant are ok

Yea ID of legacy is smaller

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1 minute ago, pl0x said:

vf38 are the ones that crap out a lot, TD04 twin scroll variant are ok
 

Yea ID of legacy is smaller

 

You mean the headers used on the vf38 crap out or the motors and turbos crap out?

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1 hour ago, pl0x said:

vf38 are the ones that crap out a lot, TD04 twin scroll variant are ok

Yea ID of legacy is smaller

 

VF38 turbos only came on the 03-05 EJ20X (automatic) Legacy's. 03-05 EJ20Y Legacy's are TD04. Then 06 is VF44 for auto & manual, and VF45 for 07-09 auto/manual.

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5 hours ago, Loren said:

Cool, thanks.

 

So the ID of the Legacy pipes is smaller than the WRX/STI?

 

Correct, marginally smaller.

 

Apparently good to ~380wkw, but that's kinda internet mythology. I'll be running them with my baby BorgWarner, looking forward to the reliability and awesome heat shielding of OEM parts :)

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