"TP" Series helix for Polaris:
Most newer 800 models, and now many others of the late model Polaris snowmobiles use a Team TSS-04 (LWT) secondary clutch.
"P" Series helix for Polaris:
Dalton’s helixes for Polaris (with prefix “P”) are progressive cut and start at one angle and progress to another. All helixes for Polaris have stainless steel spline hub for durability and corrosion resistance. Hard coating on outside wear surface for less wear.
"PR" Series helix for Polaris:
These “PR” radiused models are built like the factory “R” series that came on many models of Polaris snowmobiles. They have a short duration first angle, radiused into what is mostly a straight angle helix (or a progressive last portion in cases of 3 angles listed). With these “PR” models you’ll usually see the distinct first angle of short duration.
"P2" Series helix for Polaris:
The Polaris P-2 driven clutch was offered on some models in 09 such as the 600 Shift 136 model and some RMK mountain versions. It will be OEM clutch on many 2010 models (be sure to check with your dealer to confirm the correct application). Partial progressive are the factory type of cut, with the first short duration portion being a blended curve, then followed by a straight angle. For Polaris Partial Progressive Cut helixes the last number indicates the duration of the first section.