Confidence! That's what you get when you install a New Max Certified Cam and Lifter Set. A superior product with quality control goes far beyond, including batch testing and verification on an Adcole 911NT. The Adcole is the premier measurement equipment for camshafts in the world. So you know you're getting the finest camshaft for your application available. Each set includes a performance hydraulic camshaft, a set of matching hydraulic flat tappet lifters and a bottle of Max ZPM oil additive for break-in (Max ZPM must be added to every oil change). So what happens if you still have a cam damaging event? You're Covered! We will replace your Max Certified Cam & Lifter Set at no charge for up to five years from date of original purchase. Just completely fill out the supplied warranty card and return along with your camshaft, lifters and the original receipt. No worries that you may have over looked something that damaged your new Max Certified camshaft. Didn't notice that retainer to seal clearance wasn't enough? Covered! Valve spring coil bind.. Covered! Have a problem with your oiling system that damages the cam? Covered! While installing the cam, you drop it and it breaks in two? Covered! So what are you waiting for? Isn't it time to make a real performance change to your engine? With Max Certified Cam & Lifter Sets you're covered! For extra insurance most kits available with Direct Lube lifters.