^ to be fair, these UEL's probably perform better than some of the EL headers all things considered. It's just the tuned long tube EL headers that target the notorious torque dip work so well. lol
I think you'll be missing out, since it's not just the more aggressive ignition advance that makes this OFH tune better. Some minor adjustments in the base ignition advance and possibly MAF scale to accommodate lower grade petrol is really not that much work at all.
