This polished alloy Monza filler cap is a 2.5-inch quick-release cap for Austin Healey BN4 to BJ8 models. Finished in hand-polished alloy, it offers a lighter alternative to the chrome version while delivering the same motorsport-inspired function and secure fit. Supplied with the brass collar, it provides Healey owners with a practical and period-correct competition-style replacement for the factory filler cap.
Yes, this filler cap fits Austin Healey BN4 to BJ8 (1956–1968). It does not fit early BN1 or BN2 models due to their different filler neck design.
The fitting of these requires the fuel tank filler tube to be modified and the brass threaded collar requires brazing to the filler neck. This work should be carried out by a competent restorer or fuel system specialist. Dry-fit the collar before brazing to confirm alignment.
The polished alloy Monza cap provides a lighter alternative to the chrome plated version, with a distinctive finish favoured by many competition-prepared Healeys. It retains the same quick-release practicality and correct Healey-specific collar, avoiding the fitment issues often seen with generic aftermarket fuel caps. If a brighter, plated look is preferred, see the chrome plated Monza filler cap.
No, it fits BN4 to BJ8 only. BN1 and BN2 require a different filler neck design.
Yes, the brass threaded collar is supplied for brazing to the filler neck.
The filler tube must be modified and the collar brazed in place during installation.
Yes. Brazing should be performed by an experienced restorer to ensure safety and fuel-tight sealing.
HIGHLY POLISHED ALLOY, COLLAR INCLUDED
