O RING Oil Cooler core to cover

ForTruck spec suits Twin turbo spec as fitted to F series models only from 1/2016-> onwards

For Industrial spec 4HK1T Tier 4/Stage 3B spec engines from 1/2011-> on , only suits engines with Square shaped EGR coolers .
2 x required per engine . Also add on 2 x 20AFH2040 gasket oil cooler core to housing

For Round shaped EGR cooler for Tier 4/Stage 3B spec engines refer 2 x 20AFM1410 Oring