Marzocchi Bomber Z1 Coil Plunger and Topcap KitSo you have the Z1 Bomber Fork and want to upgrade it to the coil spring version? Don't worry, we got you covered. With the Marzocchi Bomber Z1 Coil Plunger and Topcap Kit you can upgrade your fork to gain small bump sensitivity and performance of a coil sprung fork. This kit does not come with the spring! You will need to purchase the Marzocchi Bomber Z1 Coil Fork Spring Kit also! Make sure to refer to the spring rate chart on Marzocchi's website to determine the correct spring rate for your weight and fork travel.Features Convert your Z1 fork to a Z1 coil fork. You'll have to also purchase the Spring kit.Upgrade Small bump sensitivity and performance. | Marzocchi Bomber Z1 Coil Plunger and Topcap Kit 180mm Max