Question: are msd spark plug wires worth it?
Answer: Companies like MSD, Taylor, and others may have a better wire set over OEM that are the stock wire size. The 8.5mm wires will not fit in the factory wire looms. And no, at least in a stock engine, they are not worth 2x the price of oem wires. A set of MSD wires for my lt1 is roughly 2x an acdelco set...