Stage 1 - 66/88mm Cast Wheel
The upgraded compressor wheel is not only intended for anti-surge purposes, but also supports huge power gains with the expanded wheel size and aggressive blade design. The EightySixd compressor wheels provide much more airflow than factory 60/80mm cast compressor wheel. The compressor housing has a 4" ported anti-surge inlet (the stock is only 3") so the kit does include a new 4" to 4" intake hose to fit the size. The thrust bearing in this kit is upgraded from the stock 270° to a 360° thrust bearing. The 360° thrust bearing is necessary for high boost and performance applications, not only because of the full circle lubrication, but also better designed oil feed holes. The stepped gap piston ring also eliminates the oil leaking problem.
Stage 1.5 - 66/88mm Billet Wheel
Add even more performance and gains on top of the Stage 1 kit by upgrading to the 88mm Billet Wheel for better spool up, more HP, and lower EGT's over our Stage 1 kit.