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- Converts fixed idle to adjustable idle mixture - replaces the factory plastic bush with a proper mixture screw
- Improves idle quality and drivability - allows accurate tuning for smoother idle
- Suits Holden and Ford Stromberg single & twin barrel carburettors across a wide range of models
This idle mixture screw repair and conversion kit is designed to upgrade single barrel Stromberg carburettors that were originally fitted with a fixed air idle system using a plastic bush. By converting to a fully adjustable idle mixture screw setup, you gain precise control over idle mixture, making tuning easier and improving overall drivability.
This kit is ideal for engine rebuilds, carburettor servicing, or correcting poor idle quality caused by worn or non adjustable factory components.
Vehicle compatibility:
- Holden: HQ (large base), HJ, HX, HZ, VB Commodore
- Ford: XB, XC, XD, late Cortina models
- Holden Torana: LH, UC
Engine compatibility:
- Holden Red motors
- 173 cubic inch
- 202 cubic inch
- WW stromberg red 253 you will need qty 2 for ww stromberg carburettors
Kit features:
- Idle mixture screw and spring conversion
- Replaces original plastic idle bush
- Allows accurate idle mixture adjustment
- Improves tuning capability and idle stability
Note: Final adjustment and tuning may require mechanical knowledge or professional setup to achieve optimal results.
Shipping
We ship Australia-wide via Australia Post, with tracked shipping starting from $10.95. Orders are usually dispatched within 24–48 hours, with most deliveries arriving in 2–3 business days. Rural and remote areas may take up to 5 business days.
International shipping is available, with rates calculated at checkout. Local pickup is available from Echuca, VIC — please call ahead on 03 9989 9921 before visiting.
Returns
Returns and exchanges may be accepted within 30 days of receiving your order, provided items are in saleable condition, include original packaging and proof of purchase. Returns are assessed case by case.
Change-of-mind returns, incorrectly ordered items, clearance items and products damaged through misuse or wear and tear are not returnable. Please contact us before sending back any item, especially for warranty claims.