JBI 4CS Bumper http://www.ridejbi.com/jbi-4cs-bumper-set/ JBI WP 4CS Bumper Set 1.Provides cushion when the WP 4CS forks bottom out 2. Prevents spring guide from harshly hitting the plastic cartridge cap 3. Much improved feel to rider in high impact situations 4. Easy and simple to install 5. Inspired by the KYB Open Cartridge Bumper Fork System 6. Specialized rubber compound 7. High impact absorbent 8. Durable with long service life 9. Compatible with all OEM suspension oils and Motorex, Motul, AMSOil, Maxima, PJ1, Spectro, Bel Ray, Lucas Oil, Redline, Torco 10. Sold as 2 pieces 11. Combine with a JBI Suspension Revalve to get the most out of your 4CS forks. 12. KTM, Husqvarna, and Husaberg motorcycles Motocross | Off-Road | WORCS | Enduro | Free Riding | Arenacross | Freestyle Moto