R56 Why do the HKS and Helix blowoff valve...?
Why do the HKS and Helix blowoff valve...?
Why do these blowoff valves go on the cold side boost tube where as the forge and alta valves replace the stock diverter valve? what is the difference between them?
Thanx, it's nice when it runs --- currently broken. Full story https://www.northamericanmotoring.co...ec-2018-a.html when you have lotsa time ---
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joshuatrost
1st Gen Countryman (R60) Talk (2010-2015)
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Sep 5, 2015 02:58 PM



