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91LX2Bfast · 11-15-2003, 04:36 PM

Yup. With a pull through MAF (oem type,) you want to recirculate the air. The bypass/divertor valves still make that "cool" whoosh sound, just not as loud as the bov.
With a blow through MAF, you can install a BOV and vent to the atmosphere.

11-15-2003, 04:36 PM	#19
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	Yup. With a pull through MAF (oem type,) you want to recirculate the air. The bypass/divertor valves still make that "cool" whoosh sound, just not as loud as the bov. With a blow through MAF, you can install a BOV and vent to the atmosphere.