# BBK 85-97 GM Truck 305 350 Underdrive Pulley Kit - Lightweight CNC Billet Aluminum (3pc) Install a set of BBK performance underdrive pulleys and see an average of 8-15 additional horsepower over the stock pulleys. Under drive pulleys increase engine output by reducing the draw of the engines accessories by slowing them down and reducing the HP they use. Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley which is why we recommend the BBK CNC Machined billet aluminum pulley kits for maximum horsepower gains. ALL BBK pulley kits are designed as direct bolt on replacements for the current factory pulleys and retain full cooling and charging characteristics. BBK under drive pulley kits are vehicle specific and each kit comes with complete installation instructions and allow the re-use of existing serpentine belts. - Lightweight CNC Billet Aluminum Construction - Bolt On 8-15 Horsepower in Minutes - Designed and Manufactured in USA This Part Fits: Year Make Model Submodel 1987 Chevrolet Blazer Custom Deluxe 1987 Chevrolet Blazer Silverado 1985-1986 Chevrolet C10 Custom 1985-1986 Chevrolet C10 Scottsdale 1985-1986 Chevrolet C10 Silverado 1985-1986 Chevrolet C10 Suburban Custom 1985-1986 Chevrolet C10 Suburban Scottsdale 1985-1986 Chevrolet C10 Suburban Silverado 1985-1986 Chevrolet C20 Custom 1985-1986 Chevrolet C20 Scottsdale 1985-1986 Chevrolet C20 Silverado 1985-1986 Chevrolet C20 Suburban Custom 1985-1986 Chevrolet C20 Suburban Scottsdale 1985-1986 Chevrolet C20 Suburban Silverado 1985-1986 Chevrolet C30 Custom 1985-1986 Chevrolet C30 Scottsdale 1985-1986 Chevrolet C30 Silverado 1985-1986 Chevrolet Camaro Berlinetta 1985-1987 Chevrolet Camaro Iroc-Z 1987 Chevrolet Camaro LT 1985-1987 Chevrolet Camaro Sport 1985-1987 Chevrolet Camaro Z28 1986-1987 Chevrolet Caprice Base 1985-1987 Chevrolet Caprice Classic 1986-1987 Chevrolet Caprice Classic Brougham 1987 Chevrolet Caprice Classic LS Brougham 1985 Chevrolet Impala Base 1985-1986 Chevrolet K10 Custom 1985-1986 Chevrolet K10 Scottsdale 1985-1986 Chevrolet K10 Silverado 1985-1986 Chevrolet K10 Suburban Custom 1985-1986 Chevrolet K10 Suburban Scottsdale 1985-1986 Chevrolet K10 Suburban Silverado 1985-1986 Chevrolet K20 Custom 1985-1986 Chevrolet K20 Scottsdale 1985-1986 Chevrolet K20 Silverado 1985-1986 Chevrolet K20 Suburban Custom 1985-1986 Chevrolet K20 Suburban Scottsdale 1985-1986 Chevrolet K20 Suburban Silverado 1985-1986 Chevrolet K30 Custom 1985-1986 Chevrolet K30 Scottsdale 1985-1986 Chevrolet K30 Silverado 1985-1986 Chevrolet K5 Blazer Custom 1985-1986 Chevrolet K5 Blazer Silverado 1985-1987 Chevrolet Monte Carlo Base 1986-1987 Chevrolet Monte Carlo LS 1985-1987 Chevrolet Monte Carlo SS 1987 Chevrolet R10 Custom Deluxe 1987 Chevrolet R10 Scottsdale 1987 Chevrolet R10 Silverado 1987 Chevrolet R10 Suburban Custom Deluxe 1987 Chevrolet R10 Suburban Scottsdale 1987 Chevrolet R10 Suburban Silverado 1987-1988 Chevrolet R20 Custom Deluxe 1987 Chevrolet R20 Scottsdale 1987 Chevrolet R20 Silverado 1987 Chevrolet R20 Suburban Custom Deluxe 1987 Chevrolet R20 Suburban Scottsdale 1987 Chevrolet R20 Suburban Silverado 1987 Chevrolet R30 Custom Deluxe 1987 Chevrolet R30 Scottsdale 1987 Chevrolet R30 Silverado 1987 Chevrolet V10 Custom Deluxe 1987 Chevrolet V10 Scottsdale 1987 Chevrolet V10 Silverado 1987 Chevrolet V20 Custom Deluxe 1987 Chevrolet V20 Scottsdale 1987 Chevrolet V20 Silverado 1987 Chevrolet V30 Custom Deluxe 1987 Chevrolet V30 Scottsdale 1987 Chevrolet V30 Silverado 1985-1986 GMC C1500 Base 1985-1986 GMC C1500 High Sierra 1985-1986 GMC C1500 Sierra Classic 1985-1986 GMC C2500 Base 1985-1986 GMC C2500 High Sierra 1985-1986 GMC C2500 Sierra Classic 1985-1986 GMC C3500 Base 1985-1986 GMC C3500 High Sierra 1985-1986 GMC C3500 Sierra Classic 1985-1986 GMC K1500 Base 1985-1986 GMC K1500 High Sierra 1985-1986 GMC K1500 Sierra Classic 1985-1986 GMC K2500 Base 1985-1986 GMC K2500 High Sierra 1985-1986 GMC K2500 Sierra Classic 1985-1986 GMC K3500 Base 1985-1986 GMC K3500 High Sierra 1985-1986 GMC K3500 Sierra Classic 1987 GMC R1500 Base 1987 GMC R1500 High Sierra 1987 GMC R1500 Sierra Classic 1987 GMC R1500 Suburban Base 1987 GMC R1500 Suburban High Sierra 1987 GMC R1500 Suburban Sierra Classic 1987 GMC R2500 Base 1987 GMC R2500 High Sierra 1987 GMC R2500 Sierra Classic 1987 GMC R3500 Base 1987 GMC R3500 High Sierra 1987 GMC R3500 Sierra Classic 1987 GMC V1500 Base 1987 GMC V1500 High Sierra 1987 GMC V1500 Sierra Classic 1987 GMC V2500 Base 1987 GMC V2500 High Sierra 1987 GMC V2500 Sierra Classic 1987 GMC V3500 Base 1987 GMC V3500 High Sierra 1987 GMC V3500 Sierra Classic 1985-1987 Pontiac Firebird Base 1985-1986 Pontiac Firebird S/E 1985-1987 Pontiac Firebird Trans Am ## Details - **Price:** 386.4 CAD - **Vendor:** BBK - **Type:** Pulleys - Crank, Underdrive ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 386.40 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - Primary - User 1 - User 3 - Photo - Unmounted - User 2 - Photo - Unmounted - User 4 - Photo - Unmounted --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/bbk-85-97-gm-truck-305-350-underdrive-pulley-kit-lightweight-cnc-billet-aluminum-3pc) > Updated: 2026-06-26