Stage 2: High performance street, bracket, Great for 1/8 Mile Index Drag Racing, marine and / or (dirty) racing environments using high octane gas. The interior of the blower and rotors are hard anodized, for added strength and efficiency. This Blower Has High Helix 120 Degree Rotors. Capable of producing 15+lbs of boost on engines turning in excess of 7000rpm.