LS engine enthusiasts and mechanics, these Vanlison 1218 beehive valve springs are exactly what you need for engine builds and upgrades! This 16-pack set is designed as a direct replacement for part numbers PAC1218, PAC-1218-16, and PAC-1218, so you know you're getting the right specifications. The beehive design is engineered to prevent both valve float and valve bounce, which is crucial for maintaining proper valve timing and engine performance at higher RPMs. With a 600 lift rating and 313 lbs/in spring rate, these springs are perfect when you're upgrading camshafts with grinds up to 600 lift at the valve or doing complete engine rebuilds. The compatibility covers most LS series engines including LS1, LS2, LS3, LS6, LQ4, LQ9 in displacements of 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L. The installation process involves using a compression tester to hold up your valves, removing the top fixing screws, pulling off the retainer, using a magnet to grab the keepers, and then releasing the old springs before installing these new ones. The technical specs include 1.140 inch coil bind and 1.290 inch outer diameter for proper fitment. While professional installation is highly recommended if you're not experienced with engine work, the direct fit design makes the process straightforward for qualified mechanics. The quality construction ensures reliable performance under high-stress conditions, making these an excellent choice for both street performance and racing applications. Definitely a smart upgrade for anyone building or maintaining LS engines who wants reliable valve train performance.
Free 30-day returns 
Free 30-day returns
