h34 valve

speedmo21

Member
ok im running the turbohoses hardpipes w/the flange welded on..also have the turboxs bov..my friend has a turboxs bypass valve the h34 and were thinkin about using it to replace my stock bpv..figured this mite give me alittle better airflow over the stock bpv...will this do anything for me like perforamnce wise?? or what about soundwise??
 
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If you are getting the updated Perrin FMIC, the H34 will fit right on. Otherwise, you will need to buy the flange & find a place to weld it on for you. Also, if you plan on running a dual valve setup, I would recommend the H25 instead.

It will hold higher boost levels better, but it will do nothing for performance & very little for sound, if anything.
 
Not without a silicone reducer hose like what Forge sells with their BOV. It's called H34 because it's 34mm & the stock MSP BPV is 19mm.
 
I don't know about a sr hose, but here is quote directly from TurboXS and the H34 on an MSP:

"H-series BOV will work but you must use the H-Supra adaptor kit (it is
21mm hose adaptor to H fitting and comes with the necessary plugs."
 
i was using the 25 millimeter diverter valve from TurboXS but i had it on really ghetto and i can't seem to find a propper hose to get the setup correct. when i had it on it improved driving all around in the MSP, killed the turkey too. but then the blowoff wasn't as loud, i just wish i could find a piece of hose that was like 20mm on one side and 25 on the other.

how do other people get the 25mm bpv in place of their stocker?
 

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