Brand New Big Gun Over Rev CDI Box for the; XR50/70/80/100 Part #40-R03 Adds up to 3 more horsepower once snapped in. This Rev Box is for the XR50/70/80/100 it Enhances the RPM Unlimited over the stock CDI Box.   Comes ready to install and go requires no special tools or wires. Allows RPM to rev out 800 RPM higher than stock while advancing the timing for a more torque on the bottom end. These boxes will not put a strain on your engine or valve train components anymore than stock. Big Gun includes a 6 month warranty with the Rev Boxes (first in the industry).     Buy from a Power Seller and buy with confidence. Up to 60% off Retail Price   Shipping Information; This item is in stock and ready to ship today!!  We will ship this item World Wide..   Free Shipping for Multiple Items!! If you purchase multiple items, we are glad to offer you free shipping charges. Our checkout system will automatically combine your auction purchases into a single order and consolidate your shipping charges.   Shipping Time: Orders are shipped Monday through Friday, excluding legal holidays. We strive to keep our inventory stocked and up to date, and to pack and ship orders by the following business day of their receipt. We often fulfill orders on the day they are received if payment is verified. Payment policy; After winning an auction or completing a Buy It Now purchase, please use The checkout system to complete payment. We accept all Major Credit Cards over the phone an we are Verified Business Account Member with Paypal.    Return Policy: If you are not completely satisfied with any product, return it within 7 days for an exchange or refund. We proudly stand behind every product, offering superb quality and value to our customers. Refunds apply only to returned merchandise - shipping fees are non-refundable. All returned items must be in new (unopened), re-salable condition. If a package has been refused for any reason, or returned because we were given an incorrect address, a 15% restocking fee will apply. Contact information; if you have any questions, we are here to help! Email us at [email protected]