Anodized top ring groove and crown

Line2Line abradable skirt coating applied to .003" total thickness for a ZERO initial fit to allow coating to hone in for a tight quiet running clearance

Round wire locks

Premium Hastings 1.2mm 1.2mm 3.0mm Steel Nitride top ring with a Ductile Napier second

Forced wrist pin oiling

M8 version with flat top 1.2cc with compression height 1.083", valve pockets sized to accommodate 1mm oversize valves