LS1 LS6 Ignition Coil Harness Set for Stock Location Brackets
Includes a pair (2) Harnesses

• Fits D580 and 12558948 Coils
• Used on 1998-2002 V8 Camaro, Firebird, and 1997-2004 Corvette

When installing make note of the color on the second wire on the coil connector: 

The connector with the Purple wire goes to coil that fires cylinder number 1 or 8,

Red wire goes to 2 or 7, Blue wire goes to 3 or 6, and Green goes to 4 or 5.H8