E3 Spark Plugs E3.36 Premium Powersports Spark Plug for V-Twin Motorcycles, Harley Davidson Engines, and Other High-Performance Powersport Vehicles, Pack of 1

Nice plugs, easy to install, decent price for $12 for 2. Didn’t really notice a huge difference in gas mileage or better starting. But after not changing plugs in 6-7 years. I guess anything is better. Definitely hoping this hotter plug doesn’t damage the pistons of an old bike. Seems to run good with new plugs and wires. I would buy them again, they fit tight in the head. Also definitely weird not to gap them. Let’s see how it goes with these plugs for a long summer.

Great spark plugs great for motorcycles. Burns hot to keep piston heads cleaner. Improves power and startup

They are good plugs

Did work but not as good as original spark plug for my mower

Very good. I recommend

I've been running these plugs in a 2013 street glide (stage 1) for almost 2 years exactly and put about 20K on them. The bike was progressing to hard starts, some decel popping and a bit rougher idle. I pulled the plugs and all was intact but there were no sharp edges left on any surface and the center electrodes were generally rounded at the edges. As a note I have also run boostane pro octane booster the entire time. That may or may not factor in to the wear. I remembered being pleased with these plugs when I first installed them so I purchased them again. Comparing the used to the new, it seems there may be some very minor manufacturing changes such as the extension of the center electrode from the plug body. That may be due to the wear on the used plugs, I'm not sure. Here's what really matters though; after installing the new plugs, it was a "wow" moment. The bike started immediately and with authority. I rode 35 miles to work this morning and there was zero decel popping and everything was more crisp. Rolling on the throttle was beyond better. I don't usually sing praises for a product or try to justify my purchase but simply installing these plugs really made a significant difference. As far as mileage and such I'm not sure but performance wise, these plugs deliver. For around 13 bucks every couple of years I will continue using these E3 plugs. I may even change them yearly because the performance is worth it to me.

Great performance

Will not fit Chinese pit bikes tbr7