I ran them for a year or so, thinking they were gonna be better than the oem coils combined with my URD supercharger setup. But I’ve had two fail on me. I spoke with Gadget at URD and he said they don’t recommend them and that I should switch back. They have too much research behind what they do with these engines, so I’ve taken that advice and swapped back to oem.
I don't have Accel but I'm about to test Ripp coil packs. I still have my OEM Denso packs but would probably buy new for best OE performance.
Here's an example of my Denso weighed in against the Ripp. The insulator shaft is flexible while Denso is rigid. The Ripp pack is denser in weight at the head whereas Denso feels equally weighted throughout the body.