Designed for all popular generations of GM LS engines, the FAST XR Series XR Series ignition coil set for '05-'15 GM 4.8, 5.3 and 6.0 trucks provides up to 15-20% more energy over stock ignition coils.Built from ultra-pure copper alloy windings, our coils have been tested to 8,000+ RPM and 1,500 HP.
