Has anybody tried the accel "performance" parts. Like say for instance a control module or coil? If so, have you noticed any enhancement or gains from doing so?

Has anybody tried the accel "performance" parts. Like say for instance a control module or coil? If so, have you noticed any enhancement or gains from doing so?

I've used both the Accel HEI Super Coil and an Accel HEI distributor - to be honest, I didn't notice any difference in normal driving, but the Accel parts are designed to make the HEI more reliable at high RPM, 5500+, where the stock HEI traditionally falls on its nose.