VW Beetle Dual Carb Kit — EMPI 40mm HPMX, Chrome Air Cleaners, Hex Bar Linkage | Super Beetle, Ghia, Bus & Thing, Type 1 Dual-Port (47-7317-0)
Couldn't load pickup availability
EMPI 40mm HPMX Dual Carburetor Kit — Chrome Air Cleaners, Hex Bar Linkage (47-7317-0)
EMPI 47-7317-0 is a complete dual 40mm HPMX carburetor kit with chrome air cleaners, hex bar linkage and aluminum manifolds for air-cooled VW upright Type 1 engines with dual-port heads: the 1971–1977 Beetle, 1971–1979 Super Beetle, 1971–1974 Karmann Ghia, 1973–1974 Thing and the 1971 Bus with the 1.6L Type 1 dual-port engine.
Part numbers: EMPI 47-7317-0 (often listed as 47-7317, 7317) · UPC 707924278293 · 44mm version: EMPI 47-7319-0
Fitment
| Years | Vehicle | Notes |
|---|---|---|
| 1971–1977 | VW Beetle | Dual-port Type 1 engine required |
| 1971–1979 | VW Super Beetle | Dual-port |
| 1971–1974 | VW Karmann Ghia | Dual-port |
| 1973–1974 | VW Thing | Dual-port |
| 1971 | VW Type 2 Bus | 1.6L Type 1 dual-port engine |
| — | Single-port engines | Not confirmed: they need dual-port heads first |
| 1975 on | Fuel-injected Beetles | Not confirmed unless converted to carburetors |
| — | Dune buggies and sand rails | Not confirmed: not in EMPI's list, although they use the same engine |
| — | Cars with a stock fan shroud | Not confirmed: the manifold offset may not clear |
| — | Type 3 pancake engines | Does not fit |
| 1972–1979 | Type 4 engines (Bus 1.7–2.0L, 914) | Does not fit |
| — | Porsche engines | Does not fit |
Specifications
| Spec | Detail |
|---|---|
| Part number | EMPI 47-7317-0 |
| Carburetors | Dual 40mm EMPI HPMX, matched left/right pair, test-run, with velocity stacks |
| Linkage | Aluminum alloy hex bar, steel ball ends, sealed aircraft heim rod ends |
| Manifolds | Ball-burnished/polished aluminum, Type 1 dual-port, one per head, brass manifold nuts |
| Air cleaners | Chrome, solid aluminum base/top, high-flow gauze elements |
| UPC | 707924278293 |
| Country of origin | Taiwan |
| Shipping weight | 20.95 lb |
| Package dimensions | 31 x 11 x 9 in |
What's Included
- Matched pair of 40mm HPMX carburetors with velocity stacks
- Hex bar linkage
- Aluminum intake manifolds with brass manifold nuts
- Chrome air cleaners
- Fuel line, brass fuel tee and fuel filter
- Coil relocation mount
- Hardware and gaskets
Not Included
- Fuel pump
- Fuel pressure regulator
- Distributor
- Throttle cable
- Extra jets
Why It Matters
A single stock carburetor is the biggest thing holding back a healthy dual-port Type 1 engine: long intake runners, uneven mixture between the cylinders, and a flat spot everywhere past the middle of the rev range.
This kit puts a 40mm HPMX carburetor on each head with short manifolds, so it is the complete box for converting a dual-port Beetle, Super Beetle, Ghia, Thing or Type 1-engine Bus to dual carbs.
Installation Notes
- Read the job first: EMPI's Type 1 dual HPMX/IDF instruction sheet assumes a stock, healthy engine. The fuel and ignition come off first, then the old manifold, and the carbs and linkage are bench-assembled before they go on.
- Torque limits (EMPI sheet 99-4098-0): case nut/bolt 15 ft-lbs; throttle shaft nuts 4–5 ft-lbs maximum; carburetor hold-down nuts 12–14 ft-lbs maximum.
- Fuel pressure: HPMX carbs want low, regulated fuel pressure. Fit a regulator if you run an electric pump.
- Before the first start: check that the linkage moves freely through full travel and that plug wires are clear. Then synchronize the carbs with a Syncrometer and set idle mixture with a tachometer.
- Jetting: plan on a jetting check for your displacement, cam, ignition and altitude. EMPI's baseline for 40 and 44 HPMX is a 130 main, 160 air corrector, 55 idle and F7 emulsion tube (sheet 99-4125-0).
Official EMPI instruction sheets (PDF): Type 1 dual HPMX/IDF kit installation — 99-4098-0 · Synchronizing & idle mixture — 99-4100-0 · 40 & 44 HPMX/IDF tuning & jetting — 99-4125-0 · Linkage assembly & lubrication — 99-4332-0
Frequently Asked Questions
Does the EMPI 47-7317-0 fit a 1971 VW Super Beetle?
Yes, if the engine has dual-port heads, which every US Super Beetle had from the factory. The Super Beetle was built for the 1971–1979 model years.
Will it fit my single-port engine?
No. The manifolds are for dual-port Type 1 heads. A single-port engine needs dual-port heads first.
Will it clear my stock fan shroud?
Not always. Dealers note that the manifold offset may need an aftermarket or 36hp-style fan shroud, or shroud modification. Check before you commit.
Does it fit a Type 3 or a Type 4 Bus?
No. It is for the upright Type 1 engine only. Type 3 pancake engines and the 1.7-2.0L Type 4 engine need different kits.
Should I buy the 40mm or 44mm HPMX kit?
The 40mm HPMX suits most street engines from a stock 1600 up to mild big-bore builds. The 44mm (EMPI 47-7319-0) is for larger, higher-revving engines.
Is it jetted out of the box?
It ships jetted as a matched, test-run pair, but EMPI says no single jet set covers every engine, so plan on a jetting check. EMPI's tuning sheet 99-4125-0 gives the baseline.
Explore Related Categories
Compare kits: EMPI 40mm HPMX kit without air cleaners (47-6317-0), EMPI 44mm HPMX kit (47-7319-0), EMPI Deluxe 40mm offset-manifold kit (47-8317-0) and the EMPI Pro-Sync synchronizer. Browse Fuel & Intake, All Air-Cooled VW Parts and the full EMPI Parts catalog.
Prop 65 Warning
⚠ WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov. All parts legal for use on pre-pollution controlled vehicles only.
