911 Billet Aluminium Porsche Cylinder Hold Down Nut w/ Delrin Inserts

T52140000LN  LN Engineering Billet Aluminum Cylinder Hold Down Nut featuring replaceable Delrin inserts. Threads onto your Porsche engine's 10mm head studs to hold your Porsche 911, 914-6, and 356/912 cylinders in place until you fit the cylinder heads. Sold as a set of 6 including a six replacement Delrin inserts. Features knurled ends and a matte clear anodized finish. Designed to work with ARP cylinder head studs with 10 x 1.5mm threads.