This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9"Fits Ford axle. Note: Circle track racing applications require a minimum of 4 qts. of rear end lube. Using less than this amount will lead to immediate pinion bearing failure. Warranty - For details regarding warranties, reach out to Richmond. Feel free to give them a call at (800) 583-GEAR during their operating hours from 8 AM to 5 PM Eastern Time, or send them an email at sales@richmondgear.com. They would be happy to assist you!