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.

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