Combined dropped fork springs and stubby shocks for the complete price-friendly package. Drop-in spring kit does not require the disassembly of the fork and can be installed in 20 minutes with the forks still on the bike on most bikes. Entire kit set up to go from box to bike in under an hour with basic tools. Lowers rear end up to 2. 5. Lowers front end up to 2. The lowering spring kit that does not require the disassembly of the fork and can be installed in twenty minutes with the forks still on the bike. In fact, the entire Slammer kit is set up to go from box to bike in under an hour on most models with just basic tools.