i thought somewhere someone said about 10" from the turbo, but dont quote me on that.im sure you can mount just the sensor in the pipe if you can get it to fit. It work like a blow through.
N62 MAF will work
i've never heard of an eBay fake, but yea steer clear lol
My Build
http://viewmorepics.myspace.co...36555Modification list:
Walbro 255lph, Nismo FPR, CXRacing full 3" exhaust and manifold, FMIC, and radiator, electric fan, intake, Autometer Phantom Boost, Oil Temp/Press, Water Temp, AutoGage Fuel Pressure gauge, HKS Turbo Timer, Greddy Oil Adatper w/ Thermostat, HKS EVC-S EBC, VLSD, Top Fuel Oil Catch Can, DIY Cooling Panel, KA Throttle Body