iv got a MSD wasted spark on my car . i got it as a DIY kit very nice mod there is one or two down sides with the kit some times when i turn the key i will get a coth from the motor as all the plugs fire at the same time it will never start but it is funny . you will all so have to keep your spark plugs down to a small size on the gap like .65mm not wot you would think like a mondeo which runs over 1.00mm . all so the kit will some times play up with you rev counter and will need a small bit of we wiring to sort it if running a ford clock set up . the one big down side iv had is you have to mod the ECU for the wasted spark and put some new wires inside the ECU plug which mean if you need to test a new ECU on the car it wont work unless you revers the wiring back to standerd which is a pane in the ass . but at the same time when its working it works very well