EMPI EPC 48 Carburetor | True Downdraft IDA-Style (Carb Only, Velocity Stacks)

EMPI's EPC 48 is a true downdraft IDA-style carburetor designed for high-performance applications. It features a 37mm venturi, a third progression hole for improved drivability, an enlarged float bowl for race conditions, and removable jets, emulsion tubes, and venturis for precise tuning. Includes spun aluminum velocity stacks compatible with air cleaners. All parts are interchangeable with the Weber 48 IDA, delivering IDA-class race performance at a friendlier price point. Carburetor only — you need two for a complete dual-IDA setup.

Vehicle Fitment

• VW Type 1 stroker motors: 2110cc and up — race-prep engines
• Top-end builds: Cal-look and full-race applications
• Off-road: sand rails and buggies running IDA-style power
• Best with proper IDA-style manifolds (43-5240 round-bar or 43-5242 hex-bar linkage available separately)

Why Choose EMPI?

The EPC 48 gives you Weber 48 IDA compatibility and race-ready features — third progression port, enlarged float bowl, and full jet/venturi/emulsion-tube tunability — at a much friendlier price point than the original.

Key Features & Benefits

• True downdraft IDA-style design (not side-draft)
• 37mm venturi — largest stock venturi in the lineup
• Third progression port hole — improved drivability over older IDA designs
• Enlarged float bowl — better for hard cornering and high-G race conditions
• Removable jets, emulsion tubes, and venturis — full tunability
• Spun aluminum velocity stacks included (compatible with air cleaners)
• Weber 48 IDA parts interchange — jets, gaskets, floats, and more
• Carb only — need 2 for a dual installation

Technical Specifications

• Design: true downdraft IDA-style
• Venturis: 37mm (replaceable)
• Factory jetting: Main 135 / Idle 70 / Air Correction 120 / Emulsion Tube F-7 / Needle Valve 2.0
• Sold as: single carburetor (spun aluminum velocity stacks included)
• Interchange: Weber 48 IDA
• Rebuild kit: Deluxe 43-5815-0
• Linkage kits: 43-5240 (round bar) or 43-5242 (hex bar), sold separately
• Part Number: 47-1048-0

Frequently Asked Questions

• How many do I need for a dual-IDA setup? Two. This listing is for one carburetor.
• What engines is the EPC 48 meant for? Race-prep VW Type 1 stroker motors of 2110cc and up, including Cal-look, full-race and sand rail or buggy builds running IDA-style power.
• Will Weber IDA parts fit this carburetor? Yes. Jets, gaskets, floats and other parts interchange with the Weber 48 IDA.
• What is the factory jetting? Main 135, idle 70, air correction 120, F-7 emulsion tube and a 2.0 needle valve, with a 37mm venturi. Jets, emulsion tubes and venturis are all removable for tuning.
• Are velocity stacks included? Yes. Spun aluminum velocity stacks that work with air cleaners are included.
• What else do I need? An IDA-style intake manifold and a linkage kit, EMPI 43-5240 (round bar) or 43-5242 (hex bar), sold separately. The deluxe rebuild kit is EMPI 43-5815-0.
• Is it street legal? It is legal for use on pre-pollution-controlled vehicles only.

Explore Related Categories

Building a race 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. All parts legal for use on pre-pollution controlled vehicles only.