Engine bays are possibly the dirtiest part of a vehicle, especially given the fact that contamination can cake on due to the extremes of temperature found near exhaust manifolds, turbos and catalytic converters.
Auto Finesse Finale detail spray 500ml
Gtechniq Quick Detailer 250ml
Grit Guard Black
Gtechniq W8 Bug Remover 250ml
Gtechniq W6 Iron and General Fallout Remover 250ml