Billet 8-71 Blower - Stage 2 BL-8712-0001 BDSBL-8712-0001 3-Lobe Hard Anodised Billet Rotors, Billet Front Cover & Rear End Plate, Polished BDS 8-71 STAGE 2 POLISH BLOWER All BDS blowers are assembled by hand with heavy duty competition components. The same parts used to assemble our racing blowers are the same parts used in all of our blowers. Heavy duty bearings and special double lipped Teflon seals are used to ensure long life. The heavy duty bearing plates and cases are machined to precise specifications that produce the most efficient blower possible. All BDS blowers are fully show polished as a standard feature.