Review on Enhance Performance with MSD 8239 Sport Compact Replacement Coil by Sean Spence

I've read a lot of reviews that these don't work. NOT CORRECT. It does. People don't research and even though it's on. You MUST upgrade the stainless steel base/mounting screws. Bearing bolts can affect grounding if they are galvanized or greased. Tap a hole to remove them and make sure you tighten them to the prescribed torque. Also, I would suggest changing the wires to 8-10mm so they work more efficiently.