http://www.full-race.com/articles/bo...fr-turbos.html
Scroll down to "10/22/2010 - EFR Overview"
-The most exciting technology in the EFR package is the low inertia Gamma-Ti Turbine Wheel.
-The optional EFR internal wastegate is truly designed for high flow, even for big-power setups.
-All EFR turbochargers use Extended Tip Forged Milled Compressor Wheels ***AKA Billet Compressor Wheels***
-EFR turbo compressor housings incorporate an integrated BOV
-A Boost Control Solenoid Valve (BCSV) is included with every EFR turbo (looks like a pierburg BCS, which I have on my X--very nice little valve)
-Speed sensor mounting provisions are also supplied on every compressor cover
-EFR bearing housings have the option for water-cooling.
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