Moroso 71910 Spark Indexing Washers Review

Using this product, our team found that our engine's spark performance was significantly improved. The indexing washers allowed for more precise timing resulting in a noticeable increase in power and better fuel efficiency. The washers are made of durable materials and are easy to install. However, the price point may be a bit high for some consumers.

The yellow zinc discs are basically bent 360 degrees so there's no point in using them as the ground strap is right where you started but 1 full turn back. I've tried all 10 and the same result. I really just used all the copper washers and had to tighten the plugs hard to get the index right. This set didn't impress me at all.

I was wondering if you should use these spacers along with the gasket that comes with the spark plug. When I asked this question here, I got two different answers so I contacted Moroso Tech and they told me to use the gasket that comes with the spark plug AND the lock washer I thought so but I had to make sure I had never used spacers before I haven't used them yet but I think they're a great idea and they seem well made.