This is a "Dual Spal Fans Relay Harness System" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This harness is setup for dual Spal fans and features heavy duty relays, wiring, and a 5 second delay for the second fan to ensure no fuses pop. This harness is a direct plug and play system.