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I need a downpipe and preferably a hks ssq bov

2K views 12 replies 6 participants last post by  wrxlude 
#1 ·


I have a 2003 subaru wrx and i need a new down pipe and a bov. I would prefer a hks ssq bov but beggers cant b choosers so ill take watever some one offers me. I desperately need it by this month.
 
#5 ·
gprwrx said:
Get a 3" Downpipe
Get a downpipe with whatever type of flange you have on your catback - if you have a 3" flat flange, get a 3" flat flange downpipe; if you have a 2.5" donut flange, get a downpipe that tapers to 2.5" donut.
 
#8 ·
The HKS SSQV is not a good BOV. It VTA (Vents To Atmosphere)
which is bad. Trust me on this just buy the stock BPV. Getting a aftermarket BOV will just make your car run very lean and rich. Cause idle problems, etc. etc.
 
#11 · (Edited)
gprwrx said:
The HKS SSQV is not a good BOV. It VTA (Vents To Atmosphere)
which is bad. Trust me on this just buy the stock BPV. Getting a aftermarket BOV will just make your car run very lean and rich. Cause idle problems, etc. etc.
It either runs lean or rich - take your pick :screwy:

There should be no "idle problems" if the valve is setup properly and isn't leaking - if you're not under boost, the valve is closed.

Any rich condition is minimal (~9.5:1), very short in duration (1-2 rows in a datalog), and only between shifts when in boost.




As for the HKS SSQV - there are better valves on the market (e.g., Tial / APS).

Personally, I'd run the stock valve, though.
 
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