EMPI 44 HPMX Carburetor | VW Type 1 Stroker Dual-Carb Builds | 44mm IDF-Style, Velocity Stacks (47-1012-0)

EMPI 44 HPMX Carburetor | 44mm IDF-Style Downdraft (Carb Only, Dual-Carb Jetting)

The 44mm version of EMPI's race-proven HPMX series — total air and fuel metering with separate idle and main circuits, changeable air and fuel jets, changeable venturis, and an adjustable accelerator pump. This listing is for ONE 44 HPMX carburetor jetted for dual-carb setups and includes chrome velocity stacks — you need two for a complete dual installation. Best for the most aggressive Type 1 builds, big-bore race engines, and 2110cc+ stroker motors.

Vehicle Fitment

• VW Type 1 stroker motors: 2110cc–2276cc+ performance builds
• Race / off-road: sand rails and buggies
• Best for: engines making 110+ HP

Why Choose EMPI?

The HPMX series is EMPI's race-proven performance carburetor line, engineered for total tunability. The 44mm throat is the largest in the HPMX lineup, feeding the biggest-displacement air-cooled builds.

Key Features & Benefits

• Carb only — sold individually: need 2 for a dual install
• 44mm IDF-style downdraft design — bigger throat than the 40 HPMX
• Chrome velocity stacks included
• Dual-carb jetting from the factory
• Best for stroker motors and full-race engines
• Separate idle and main circuits
• Weber 44 IDF parts interchange

Technical Specifications

• Design: 44mm IDF-style downdraft
• Venturis: 28mm
• Factory jetting (dual setup): Main 135 / Idle 60 / Air Correction 160 / Pump 50 / Ex. Pump 350 / E-Tube F-11
• Sold as: single carburetor (chrome velocity stacks included)
• Interchange: Weber 44 IDF
• Rebuild kits: 00-2362-0 or 00-9949-0 (Deluxe 43-5813-0)
• Part Number: 47-1012-0

Frequently Asked Questions

• How many do I need for a dual setup? Two — this listing is for one carburetor.
• Will the jets and parts interchange with other carbs? Yes, parts interchange with the Weber 44 IDF.
• What builds is this best for? Stroker motors and full-race engines making 110+ HP.

Explore Related Categories

Building a performance top end? Browse our Fuel & Intake for carbs, manifolds, and linkage, our Engine catalog, and the full Air-Cooled VW collection.

WARNING: This product can expose you to chemicals including Lead which are known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. Wash hands following installation or before eating. All parts legal for use on pre-pollution controlled vehicles only.