PISTON FEATURES

AK: oil cooling jet recess
BB: piston Bin Bushing
CI: cast Iron
HA: hard Anodised
KK: oil cooling gallery
MoS 2: MoS 2 Cooling
RK: steel strut
RT: Alfin ring carrrier
TP: keystone Con-Rod
TF: milled crown surface

RINGS SET
COATING AND SURFACE TREATMENTS

CR - Periphery chrome-plated
CKS - Periphery chrome ceramic plated
CDS - Periphery chrome diamond plated
CRI - Inled chrome-plated
CR3 - Periphery not chrome, other sides chrome-plated
CR4 - All sides chrome-plated
FE - Ferroxided
FX - Periphery with Ferrox insert
IN - Coil spring and internal coil groove chrome-plated
MO - Periphery molibdenum coated
NIT - Nitrited
P - Phosphated
PL - Periphery plasma spray-coated
PVD - Physical Vapor Deposition
SN - Tin-plated
TF - Periphery Teflon coated

OTHER FEATURES

B - External upper chamfer
ES - Napier interruption near the gap
S - Steel
* - Special material