New for 2019 from Carson City, Nevada based manufacturer United Engine & Machine (UEM) are these Super Duty Series KB pistons for 2017 and up 114 and 117" M-8s using stock cylinders bored to 4.125" with 11:1 compression ratio and generous valve pockets to accept 1 mm larger valves.
A hard anodized crown aids with heat deflection and corrosion from alcohol fuels. Top ring groove hard anodizing eliminates micro-welding of the ring to the groove and maintains a flat and smooth surface for best ring seal.
They have round wire locks, premium Hastings 1.2 mm, 1.2 mm and 3.0 mm rings with a steel nitrile top ring with a ductile Napier second.
These M-8 series feature 'Line2Line' abradable coating as standard - applied to the thickness of the piston-to-wall clearance for a ZERO install clearance. The coating abrades in on start-up to hone for the perfect fit per cylinder and eliminates piston rock for the best possible ring seal with no piston slap noise.
The complete kits include two pistons, rings, pins and locks and are available for 120" applications from 4.125" bore up to 4.185" bore.
KB PERFORMANCE PISTONS
www.uempistons.com