STOP buying from no-name chinese brands with parts that just break after a few weeks of use. Redline USA (Portland, OR) are quality parts distribution companies that use advanced first-world ISO certifications and all parts go through a pre-shipment inspection in addition to our own in-house quality testing. LIFETIME WARRANTY IF INSTALLED BY A CERTIFIED MACHINIST THIS LISTING WILL INCLUDE: (1) 917-162XD VALVE LIFTER OIL MANIFOLD (VLOM) (8) PREMIUM AFM LIFTERS (8) PREMIUM LS7 STYLE LIFTERS With 3 points of quality assurance, including pre-shipment inspections, random factory audits, and even packaging inspections, we are leading the way as a premier wholesaler of quality engine parts. Due to our commitment to quality, all stock replacement engine parts qualify for our LIFETIME WARRANTY when professionally installed. Our onsite engineers check each part in our extensive product catalog, measuring and testing to ensure each part meets the highest materials standards. As our customer, you have peace of mind, knowing that our experts are monitoring part history, and quarantining non-conforming products so that only the highest quality parts are shipped.