ACT Drive Models. 2005 direct bolt in using stock 05 adjustable cover, or 06-2011 with the use of 2005 OEM cover or a Dalton cover. If you have a 2006-2011 you need one of the covers to use this helix.

Dalton helixes with "C" designation are for all 2005-2008 ACT models, and for 09 and newer 4 stroke models or shuttle reverse button models. (all 06 and newer require cover to use this helix, see notes).

This model is NOT for 2009+ two stroke models that have the engine run backwards. Two stroke models with electronic engine reverse need the "CR" designation

*Note: This is a tubular type helix for pre- 2006 ACT Drive models. When used on a later (2006-2011) version ACT diamond drive secondary it requires the use of the DHC-100 cover, or the cap and assembly parts from a 2005 Arctic Cat model.