U need a spark plug, a HT lead, you need a switch, wire, also the main bit is the ignition module thing which controls the sparker to come on and off with the switch, also you gotta drill thru ut tailpipe and either screw or weld the plug into place. I got mine fitted properly by SCC performance (www.sccperformance.co.uk) But you may find you can do it yourself if you get all the right bits and good with a welder.