I have one of these installed on my car and it rid my engine of a nasty breakup I was getting under WOT. The other benefits of this system is that it installs in minutes with a spliced harness and its much smaller compared to other ignition amplifiers.
I would buy this before I would buy an MSD simply because HKS has tested this system on the SR while I doubt MSD has ever done it.
Yah. HKS even have dyno number on their web site. And i even have the full harness for any S13 or S14. Just plug and play. No CUTTING No sticky electric tape