DBR TM Designworks Chain Guide MX IRB Honda D BLACK : (07->C) CRF250 R/X, (07->C) CRF450 R/RX/L, (08-14) CRF450 X Inner Rub Block Only

The only made in USA replacement Rub Block with oil additive and UV protection.
Higher quality Then OEM Rear Chain Guide  Rub Block in Black or red.
The chain block is longer and fits outer shell much better than stock
Replacement is upgraded design with a new plastic compound to wear about 15% longer.
Fits stock aluminum ‘U’ shaped shell, Carbon Fiber or TMD "POLIBAR" rear Chain Guide Shell.
All other inserts are made overseas with no design or material upgrades.
Made from special compound for quieter performance when replacement is needed.
Tested in competition and used by Geico Honda, Moto Concepts Honda team.
MADE IN USA