This pair of SU HD6 carburettors to specification AUC914 is correct for Austin Healey BN7 and BT7 models in two production windows: engines up to 29D-H2863 and then 29D-H6395 to 29D-H18655. They represent the standard twin-carb induction fitted to early 3000 Mk I cars.
The AUC914 units are side-draft, with side-mounted float chambers and jet assemblies that align with the original inlet manifold and linkage geometry—ideal for owners maintaining factory specification or completing an original-spec rebuild.
Fits Austin Healey BN7 and BT7 engines up to 29D-H2863, and 29D-H6395 → 29D-H18655.
For engines 29D-H2864 → 29D-H6394 use AUC935, and for 29D-H18656 → 29D-H26212 use AUC963.
Routine tuning is simplified with the dedicated HD6 service kit, which supplies gaskets, seals, jets and needle assemblies for each carburettor.
