Fuel System

Weber 38 Carburettor Kit


Here is a brand new Triumph Stag Weber carburettor upgrade which can transform the performance and reliability of your car.  This product is suitable for all Stags, 1970-78, with automatic or manual gearbox.  See our Weber Carburettor Conversion Video on YouTube.

The Weber kit comprises a brand new Weber 38DGMS carburettor, specially set up for the Triumph Stag by Webcon UK Ltd, plus the all-important Manifold Adapter, and all the hoses, gaskets, linkages, nuts and bolts etc necessary to fit the carburettor to the car.   The following optional air filters are available (all filters have hose adapters for connection to the cam cover breather):

Ramflo Air Cleaner; This adds a smart, compact chrome mesh filter which takes up less space and also fits under the standard bonnet (hood).*

CoolAir Filter; This is the ultimate, unique low-profile air filter for your stag engine; the intake of cooler air allows the engine to develop more power (colour may vary)

American Air Filter; A large 14x3 inch chrome filter brought back by popular demand.

*may require adjustment or relocation of underbonnet bar, if fitted.

Price: £440.00

CoolAir filter


  NEW COLOUR: DOVE GREY (18/06/2000) 

This new stagweber CoolAir filter system is designed especially for the Weber 38, and includes a readily available replaceable air filter element

Price: £99.00

Active Breather System


This easy to install kit comprises an Oil Catch Tank, PCV valve, One Way Valve, and all the hoses and fittings needed to install an Active Breathing System for connection to the cam cover. .  Now upgraded to the improved Type 2 System which has an additional, passive vent path to deal with greater crankcase pressurisation.

The Weber option of this kit also requires a Manifold Adapter which has a vacuum port..  PLEASE NOTE:  If you already have the Weber kit, but this does not already have the vacuum port, please contact us to discuss and arrange for how this is to be carried out (for example, in UK we can modify yours for you by post).  Note: Holley Carb: Not applicable to the 'Holley' carburettor since that already has a suitable vacuum port.


1. Q. Do I need the breather kit?  A. Probably not!   If your oil seals and gaskets are good, and your engine does not emit oil from the breather, you do not need this kit.

However, for engines that need it, this kit has been developed for use on the few cars that might gain some benefit from the addition of an Active or positive Breather System.   For example, where engines may emit some oil from the cam cover, and/or where there are minor oil leaks which occur without the Stromberg breather system, they may benefit from fitting an ABS kit.  Please note that this breather system may not have sufficient capacity for engines with a high volume of crankcase emissions.

It is not necessary to purchase this kit prior to fitting the Weber carburettor conversion.  Please call us to discuss if you are unsure of the relevance of the ABS kit.

2. Q. How does it work?  The cam cover breather outlet connects to an oil catch can to trap any oil.  A suitable vacuum connection is required (on the Weber it is under the carb).  This vacuum is regulated by a PCV valve fitted to the catch can, and this moderate vacuum helps to prevent oil leaking from bad seals). For wide open throttle conditons a one-way valve bypass allows any excess gas under pressure to release into the air filter and then be drawn into the engine. 

3. Q. Is this suitable for cars with fuel injection? A. Yes, if your FI has a vacuum port, then select the Holley option.


Price: £85.00

Big Bore 44 Carburettor



Still on Special Offer: Price shown is £30 off normal list price (limited period only)

Price: £539.00

Ramair Filter (BB44)


This Ramair RS filter is made specially to fit our BB44 carburettor when installed on the Triumph Stag.   It is based on the

Ramair RS2-245-404, but manufactured using a custom 65mm internal height, and bespoke laser cut baseplate. 

Price: £69.00

Bracket, kickdown cable


Bracket to mount kickdown cable for BB44 carburettor conversion.

Price: £15.00

Weber 38 Rampipes


NEW!  Optional Upgrade for the Weber 38 carburettor.

This rampipe fitment improves airflow into the Weber 38 carburettor for a more consistent mixture and less turbulence. 

This helps the engine to pump through more air/fuel mixture leading to greater torque and power.

  • Easy to fit yourself in two minutes.
  • Retains using four screws
  • 3D printed in durable PA12 Nylon
  • Zero maintenance
  • Special introductory price



Price: £29.50

Weber 38 fitting kit


This kit contains the  same parts as the Weber 38 kit but excludes the Weber 38DGMS carburettor.  This can be useful for those that already have the carburettor, or those abroad that want to source one locally.  The parts include the all important base manifold adapter, plus throttle linkage, auto kickdown linkage, and all brackets, screws, nuts, fittings, hoses you are likely to need to fit the 38DGMS to the engine.

Price: £195.00
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