Aluminium filler cap and neck

Made from high quality Aluminium our weld-on billet filler caps and necks are specially designed for radiators, catch-cans, reservoirs and fuel tanks

Billet dome and Cap 

Billet dome and cap to suit 3" diameter aluminium tube. Perfect for overflow tanks, reservoirs etc 

These dome ends and caps have been locally CNC machined with a -16AN ORB thread, they can be utilised with AN fittings for catchcans, remote tanks etc, 

Comes with a black anodized cap

Billet neck and Filler Caps are available in 1.5" 2", 2.5" and 3.5"

1.5" - measure 38mm across the weld-on base and 44mm across the cap

2" - measures 49mm across the weld-on and 56mm across the cap

2.5" measures 58.5mm across the weld-on and 69 across the cap 

3.5" measures 90mm across the weld-on and 92mm across the cap 

Black anodized cap, 

Radiator filler neck and pressure cap

Small neck and cap

 measures approx 47.5mm across the weld-on base and 19.75mm internal hole with an 8mm overflow tail