Stage 3 is recommended for slightly higher performance on a stock setup, and highly recommended for users with aftermarket exhaust/air or have plans for them in future. Higher intensity spark with faster recovery and response. Supplies 34% more energy than stock coil.Plug & Play, replaces your stock Coil, installs in minutes. Crisper Throttle response and a quicker rev (with more pull through the RPM's). Cleaner spark-plug which (ultimately means you are getting the most out of your fuel). Keeps your (valves/piston) cleaner and reduces build up on Spark Plug (less chance of fouling). Spark plug boot NOT included. The item "High Performance CDI Box + Ignition Coil for Yamaha Raptor 660 2002-2005 Stage 3" is in sale since Monday, April 15, 2019. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Electrical Components". The seller is "gear-junkies" and is located in Las Vegas, Nevada. This item can be shipped worldwide.