Part No. 6107462 NICKLE GNARLY EXPANSION CHAMBER Constructed from thick 18 gauge steel, THE GNARLY was made specifically for those who ride in the roughest terrain and require the strongest, most reliable equipment. The performance of the GNARLY is focused toward a strong low-end with meaty midrange to provide the torque and tractability of a 4-stroke but still maintain the responsiveness of a 2-stroke. The GNARLY is the preferred pipe for our top Enduro and GNCC riders where abrupt power and rugged durability are a must. To Fit: BETA 250/300RR 13-18