These Super Pivot Bar Ends are just AWESOME!! We all know Heim joints suck ass for daily drivers. And if you didn?t know, now you do. They wear out and make tons of noise. Its metal on metal with road grime mixed in just grinding them away. I know from past experience, and I will never go back. EVER! You may say, ?But the guys of NASCAR use them?. Yeah, and they change them out after every race too. Do you want to change out your link ends after every 500 to 1000 miles? Hell no! I?m not saying a heim will wear out after 1000 miles, but mine got shitty quick. And they were ?good ones? with the Teflon injection. PSSHHHTT!! JUNK! These Super Pivots do cost twice as much as a Heim joint though. But they are 100 times better, so it?s worth it. Each one comes with a special bolt with a grease fitting, so you can keep them lubed up. Placing one on each of a 4-link bar will take away any binding you may get with a triangulated set up. Also, for you guys that like to get mad crazy with side to side action, using these are a must if you want to have a trouble free link. You know those rock crawling JEEP dudes? They use them because one side of their axle needs to climb up on the side of a boulder. If that?s not smooth side to side axle pivot, what the hell is?