Power reeds use a patented dual stage fiberglass design for more air flow, more air volicity and more powerThis item fits the following vehicle applications:for E-TON Lightning 50 2001for E-TON Viper 50 2002-2004for E-TON Viper 50M (for Mini) 2005for Polaris Predator 50 2004-2006for Polaris Scrambler 50 2001-2003