AI Weber Carburettor Conversion Kit for the
Sunbeam Rapier Fastback, Hillman Hunter, Humber Sceptre and Singer Vogue
(Rootes Group Arrow Range)

AI Weber Conversion Kit (entry level) installed in Fastback RapierThis is an adaptation of our conversion kit for the Sunbeam Alpine. The main difference is the inlet manifold as these cars have the same engine but canted at different angles on two axes compared with the Sunbeam Alpine. Additionally, the throttle linkage differs. Pictures show an Entry-level kit in a Fastback Rapier.

Not just a collection of off-the-shelf components, the Weber 32/36 Carburettor conversion kit for the Sunbeam Alpine was developed as a project in partnership with Webcon UK Ltd., carefully selecting and tuning each component. The inlet manifold with its curved runners, unique to Alpine Innovations, is mated to the genuine Weber 32/36 DGV carburettor with an insulated spacer gasket. The unique jetting of the carburettor was established after 3 days of testing on Webcon’s rolling-road with the resulting customisation optimised for performance, fuel economy and drive-ability. A plenum chamber, ducting hose and K&N filter enables cooler air to be drawn into the carburettor, rather than air preheated by the exhaust manifold and engine. Since these cars have the same engine mounted at a slightly different angles,  the development is relevant to both conversions.

Note: This kit is not suitable for use on engines with a cast iron cylinder head.


Complete Kit including K&N Conical Filter

Everything you need to transform your driving experience.

Picture shows Sunbeam Alpine kit
– manifold angle and throttle linkage differ.

Price £705.38 exc. VAT  /  £846.46 inc.VAT

Kit consists of New AI Inlet Manifold, Weber 32/36 DGV Carburettor (Model Specific Jetting), Insulator Gasket Block, Plenum Chamber, Air Intake Ducting Hose 700mm, K & N Conical Air Filter,  Fuel Filter, 2ft. Fuel Delivery Hose, Jubilee Clips, Manifold Studs, Nuts, Washers, Cable Throttle Linkage Kit.


Entry Level Kit

This entry-level kit does not have the advantage of the cold-air induction provided by the plenum chamber, hose and K&N filter and instead locates the air filter on top of the carburettor.

Picture shows Sunbeam Alpine kit
– manifold angle and throttle linkage differ.

Price £606.38 exc. VAT  /  £727.66 inc. VAT

Kit consists of New AI Inlet Manifold, Weber 32/36 DGV Carburettor (Model Specific Jetting), Insulator Gasket Block, Fuel Filter, 2ft. Fuel Delivery Hose, 2 x Jubilee Clips, Redline 45mm Rectangular Washable Air Cleaner, Manifold Studs, Nuts, Washers,  Throttle Cable Throttle Linkage Kit.