SU HS6 Triple Carburettor Set for Austin Healey 3000
This SU HS6 Triple Carburettor Set is designed for performance or custom applications on six-cylinder Austin Healey 3000 engines. While triple-carb setups were not offered as a factory option, this kit delivers a popular modification for tuned road cars, historic rally builds, or period-style restorations.
The set includes three brand-new SU HS6 carburettors, pre-spaced and fully linked for straightforward fitting to manifolds designed for triple-carb arrangements. Built to the original SU specification, these units provide reliable operation and balanced air–fuel delivery across all cylinders.
Benefits
- Triple-carb layout for performance-tuned six-cylinder Healeys
- Supplied as a pre-assembled set with correct linkages and spacers
- Delivers smoother throttle response and balanced fuelling
- Brand-new SU HS6 carburettors—no refurbishment involved
- Ideal for rally builds, custom restorations, and fast-road conversions
Compatibility & Fitment Guidance
This kit is suitable for Austin Healey 3000 engines fitted with or adapted to use an inlet manifold that accepts three HS6 carburettors. It is not a standard factory-fitment and should only be used where appropriate clearances and mounting geometry are confirmed. Always verify your manifold configuration and bonnet clearance before ordering.
Why Fit This Assembly
Older twin-carb setups can suffer from uneven fuelling, poor idle quality, or worn components. A triple-carb configuration helps achieve better throttle synchronisation and air–fuel distribution—especially beneficial for tuned or high-performance engines.
Technical Notes
- Carburettor Type: SU HS6 side-draft (1¾″ bore)
- Set Includes: 3× new carburettors, pre-set interconnecting linkages, correct spacers
- Assembly: Pre-aligned and ready for installation
Servicing & Maintenance
Each HS6 carburettor can be serviced individually using standard SU HS6 service kits, which include gaskets, seals, and needle assemblies. Regular inspection of linkages and jet alignment is recommended for peak performance.
Note on Originality
This assembly is an aftermarket performance configuration and not a documented factory specification. Intended for experienced builders or restorers seeking a triple-carb solution tailored to custom manifolds or upgraded engine builds.
Factory Carburettor Reference
Use the table below to confirm the original factory carburettor type for your Austin Healey 3000 variant.
Factory Carburettor Reference
| Model | Chassis Codes | Production Dates | Factory Carbs | Bore Size |
| MK I (3000) | BN7/BT7 | Mar 1959 - May 1961 | Twin SU | HD6 1¾″ |
| MK II (3000) - Tri-carb | BN7/BT7 | Late May 1961 - Mar 1962 (BN7)
Jun 1962 (BT7) | Triple SU | HS4 1½″ |
| MK II (3000) - BJ7 | BJ7 | Aug 1962 - Oct 1963 | Twin SU | HS6 1¾″ |
| MK II (3000) | BJ8 | Oct 1963 - 1967 | Twin SU | HD8 2″ |
FAQ
Can I use this on a standard Austin Healey 3000 MK2 or MK3?
Only if your car has a compatible manifold for three HS6 carburettors. Factory models typically used two. This kit is for custom applications.
What is the main benefit of this kit?
Improved air–fuel balance and smoother throttle response, especially useful on tuned or performance engines.
Will I need custom throttle linkages?
No — the kit includes pre-assembled linkages. However, depending on your car's setup, some adjustment to pedal or cable geometry may be needed.
Is this kit suitable for concours restorations?
No — it's ideal for performance or period-style builds but is not a factory-correct specification.
Are the carburettors used or refurbished?
All three carburettors are brand new, supplied as a pre-aligned and fully assembled set.