- TPHD Steel Turbo Pipe 5" Diameter For Kenworth T600/T800/W900 With CAT Engine$94.49TPHD-02-0801000Grand Rock Kenworth W900B, L, T600 or T800 Dual Side Exhaust LayoutStarting at $39.13GR-KWW900BD-GDynaflex Kenworth W900L Right Side 6 Inch Elbow 6 Inch to 5 Inch With 45 Step CHECK OEM$709.45DF-14ZKWX-R86166050CPDynaflex Kenworth W900B Over Frame Right Side 6 Inch Elbow 6 Inch to 5 Inch CHECK OEM NU$651.05DF-14ZKWX-R47646050CP