Dynamic Racing - 15.8:1 High Compression Piston Kit w/Gaskets, Valve Seals and an Oil Filter. We have been privately selling these to a couple teams here in the USA an across the pond for the last 2 years but the latest spec has changed. So, now we are blowing these out to make room for new machines in the shop. Get them before they are gone. Big performance upgrade with this piston. Substantial increase in compression, for race fuel applications only! High recommend using this with our Vortex ECU and custom tuned maps. Pro6, MR12 or equivalent should be used. Includes: -15.8:1 JE Piston (Custom undercrown milling to work with the beefy Carrillo Rod) -DLC Coated Wrist Pin -OEM Rings -C-Clips -OEM Head and Base Gasket -OEM Valve Guide Seals -HF Oil Filter