550 kits are for big bore applications
Top vent has large central slider channels air down to the top of the head for better comfort
Overall helmet shape developed for aerodynamic efficiency and stability
Aero-tuned ventilation system features one large intake vent on top
2009-2010 Arctic Cat 700 EFI H1 4x4 Auto
Fire Power HJTX20HQ-FP-B Featherweight Lithium Battery helmets 550 kits are for bigDimensions: 6 7 8in. L x 3 7 16in. W x 5 1 8in. H. Reference C. C. A.: 385. C. A.: 440. Amp Hour: 8. Max. charging amps: 30. Post Position: Left Right Quad Terminal. Approx. Weight (lbs): 3. 6. Battery Model Number Reference: GYZ20H, GYZ20HL, GYZ20L, HVT 1, HVT 4, HVT 5, HVT 6, SY50 N18L AT, SYB16L B, Y50 N18A A, Y50 N18L A, Y50 N18L A2, Y50 N18L A3, Y50 N18L A CX, YB16 B, YB16 B CX, YB16C B, YB16CL B, YB16HL A CX, YB16L A2, YB16L B, YB18 A, YB18L A,