EMPI 1.10 Main Jet for HPMX/IDF/IDA/DCOE Carburetors — 1.10mm metering orifice | Porsche 914 (1970-1976) (43-5301-0)
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The EMPI 43-5301-0 is a genuine EMPI 1.10 main jet with a 1.10mm calibrated brass orifice for EMPI 40/44 HPMX, Weber 40/44/48 IDF, EPC 48/51, 48 IDA and DCO/DCOE carburetors. It meters fuel at high rpm and wide-open throttle on air-cooled engines, including the 1970–1976 Porsche 914. Threaded; swaps with a flat screwdriver.
Part numbers: EMPI 43-5301-0 / 4353010 / 43 5301 0
Fitment
| Years | Vehicle | Notes |
|---|---|---|
| 1970–1976 | Porsche 914 with 40/44 HPMX, 40/44/48 IDF, 48/51, 48 IDA or DCO/DCOE | Listed fitment |
| Not specified | Air-cooled engines running those carburetors | Fits by carburetor, not by chassis |
If you are unsure this fits your car, contact us with your year and model before ordering.
Specifications
| Spec | Detail |
|---|---|
| Brand | EMPI |
| Part number | 43-5301-0 |
| Type | Main jet (threaded) |
| Size | 1.10 |
| Material | Brass |
| Carburetors | EMPI 40/44 HPMX; Weber 40/44/48 IDF; EPC 48/51; 48 IDA; DCO/DCOE |
| Orifice | 1.10mm calibrated |
| Function | Meters fuel at high rpm and wide-open throttle |
| Boxed dimensions (as listed) | 2 x 1 x 1 in |
| Shipping weight (as listed) | 0.024 lb |
Why It Matters
On a Weber or HPMX, the main jet is where wide-open fuel is decided, and the 1.10 sets a deliberately lean starting point. A 1.10mm brass orifice for smaller-displacement or milder builds, it leaves you room to step up if the top end reads lean.
Installation Notes
Threaded brass jet; it swaps with a flat screwdriver.
Frequently Asked Questions
What carburetors does the EMPI 43-5301-0 main jet fit?
It threads into EMPI 40/44 HPMX, Weber 40/44/48 IDF, EPC 48/51, 48 IDA and DCO/DCOE carburetors, including on the 1970–1976 Porsche 914.
What does a 1.10 main jet do on a Weber IDF or HPMX?
The main jet is a calibrated brass orifice that meters fuel at wide-open throttle. The 1.10 has a 1.10mm opening, a lean baseline size.
How do I change a main jet on an IDF or HPMX carburetor?
It is a threaded brass jet that swaps with a flat screwdriver.
What is the EMPI part number for the 1.10 IDF/HPMX main jet?
EMPI part number 43-5301-0 (also searched as 4353010).
⚠ California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
