We run this same kit on both of our world record setting all motor nitro cars pushing 600+ WHP ALL MOTOR. At our level, a potent reliable spark is needed in order for proper combustion to occur. This kit is extremely reliable. 
 
Kit includes:

4) Racegrade smart coils 
4) Coil connectors
4) Spark plug wires 
1) Relay 
1) Coil holder

Optional - Coil holder mount for side of k series cylinder head (k20a/CRV)