Weber

Carburetor Idle Jet (Select Size) — Weber IDF/DCNF & EMPI HPMX

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$5.91
Product details
  • Vendor Weber
  • SKU 43-5510-18
  • Fits
    • 1948-1965|Porsche|356
    • 1965-1969|Porsche|912
    • 1969-1976|Porsche|914

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Carburetor Idle Jet (Select Size) — Weber IDF/DCNF & EMPI HPMX (Weber 43-5510-18)

Replacement idle jet for tuning the low-speed circuit on Weber IDF/DCNF and EMPI HPMX carburetors. Idle jets control fuel delivery at idle and light throttle — a common first step when dialing in a fresh dual-carb setup.

Vehicle Fitment

  • Porsche 356: All years (with Weber/EMPI IDF-style carbs)
  • Porsche 912: 1965–1969 (with Weber/EMPI IDF-style carbs)
  • Porsche 914: 1969–1976 (with Weber/EMPI IDF-style carbs)

Key Features & Benefits

  • Select-size ordering: Available in sizes 40–70 to fine-tune your idle circuit.
  • Direct fit: Compatible with Weber IDF/DCNF and EMPI HPMX carburetor bodies.
  • Genuine Weber jet: Precision-drilled for consistent, repeatable fuel metering.

Technical Specifications

  • Type: Idle jet, sizes 40–70
  • Fits: Weber IDF/DCNF, EMPI HPMX carburetors
  • Brand: Weber
  • Part Number: 43-5510-18

Frequently Asked Questions

  • How do I know what size I need? Idle jet sizing depends on your engine combination and target A/F ratio — start from your carb manufacturer's baseline chart and adjust from there.
  • Does this fit my carb? It fits the idle jet holder on Weber IDF/DCNF and EMPI HPMX carburetors — confirm your carb model before ordering.

Explore Related Categories

Carburetors · Fuel System · Porsche 356

Prop 65 Warning

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov.