Valve covers sorted by make - FORD Crossflow 6,cyl
 
X series Falcons Ford Crossflow 4.1ltr six cylinder engine also know as the 250 crossflow, alloy head crossflow engine, X-flow.  These engines first appeared in the 1978 XC Ford Falcon with a cast iron head. The cast iron head X-flow only ran for XC and XD falcons and the XE model Falcon sported the re-designed alloy head which was a more efficient head than the early cast iron versions. This later alloy head crossflow was a high port design which allowed the engine to breath easier and hence more fuel efficient and more torque, so it is easy to make good power with these later alloy heads.  These AussieSpeed rocker covers fit all model crossflow engines both cast iron head and alloy head X-flows.
 

 
These AussieSpeed valve covers are taller so you can fit roller rockers and they have cast in oil baffles for good oil control, They are sand cast so you can easily weld fittings in them for custom race engine applications. They are very popular amoung Speedway racers and drag racers running serious X-flow race engines.