Tri-Y Headers for 68-91 GM Truck 396-502 BBC 1-3/4in Primary D303Y-B engine-components Kenworth W900 (1992

Kenworth W900 (1992

MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 441111 helps keep the check engine light off

Upgrade Your Vehicle's Performance: This kit includes Differential Drop Brackets

Volvo 780 (1987-1990)

7 V8 1988 - 1990 Chevrolet C3500 454/7

Tri-Y Headers for 68-91 GM Truck 396-502 BBC 1-3/4in Primary D303Y-B engine-components Kenworth W900 (1992Overview: 68 91 GM Truck BBC Tri Y Black Ctd Doug's is the pioneering force behind the popular TRI Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid range torque without sacrificing top end power. TRI Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency. Features: 3 8" thick machined flanges to prevent warping CNC