Product Description
PLUG WIRE SET, 6.0L Motors:
NOTE: 6.0L motor 08 and older use PCM part #RK120021A (was red on original motor, now they are black in color)
If 6.0L motor is 09 or newer (LY6/ZR409) use item #RK120022
If 6.0L motor is Catalyst use item #RK120021B