RCV Performance Revolutionary axle shaft designs provide the strength, smoothness, and reliability you need to power through the most demanding off road conditions. RCV Ultimate CV axles simply replace existing u joint axle shafts and are also offered in configurations to fit independent front suspension. RCV's proven strength and performance just can't be matched. Even if you have big tires and big power there are no worries. Ultimate CV Axles are low maintenance and operate with a smoothness you can feel - whether off road or in the street. And we back it all with a "No Questions Asked" limited lifetime warranty.