Edelbrock VRS-4412: A 500 CFM Two-Barrel Built For Racing And The Street

Caecey Killian November 5, 2026 4 min read 0

4

The carb that stopped us cold in the Edelbrock booth at SEMA 2026 wasn’t a big double-pumper. It was a two-barrel. The Edelbrock VRS-4412 (part #13022) is a 500 CFM, four-circuit carburetor. It’s built for racers stuck with a two-barrel rule and for street builders who want sharp throttle response without a four-barrel on top.

Below we cover what’s inside, who it’s for, and why we think it will end up on more than circle track cars. If you want to see how we sorted out induction on our own small block, check out our SBC 350 carburetor setup on Project Street Reaper.

What The Edelbrock VRS-4412 Brings To The Two-Barrel Class

The Edelbrock VRS-4412 is a 500 CFM two-barrel with four-circuit metering and annular boosters. It also gets a power valve with backfire protection and a baffled fuel bowl with jet extenders. The name points straight at the 4412-style two-barrel that has been the rulebook carb in limited classes for decades.

That matters because a limited class leaves you very little room to play. When the rulebook caps you at 500 CFM and two barrels, nobody gets more air, so the gains come from how well the carb meters fuel. Edelbrock is betting that more tuning control inside the same airflow limit is where racers will find their edge. That same control pays off for anyone running a two-barrel on the street, too.

Four-Circuit Metering And Annular Boosters

Four-circuit metering gives the tuner separate control of fuel delivery from idle through high RPM. That lets you chase down a lean stumble coming off the corner without fattening up the top end. For anyone who has spent a weekend swapping jets to fix one spot in the rev range and breaking another, that kind of separation is worth a lot.

Annular boosters ring the venturi with discharge holes instead of a single nozzle, so fuel breaks up finer at low airspeed. Better atomization means the mixture burns more completely when the throttle first cracks open. On a two-barrel, where every bit of airflow counts, you feel that as a quicker answer from the pedal.

Power Valve And Fuel Control For Hard Driving

The integrated power-valve circuit lets the engine run leaner during light-load cruising, then opens up full fuel at wide-open throttle. The backfire protection is the part we like. A pop through the carb is the classic way to blow a power valve diaphragm and end up running pig rich for the rest of the night.

The baffled fuel bowl and jet extenders keep fuel at the jets during hard cornering, braking and launches. Edelbrock even mentions demolition derby use, which tells you how much abuse they expect it to take.

Street-Friendly Connections

A universal-fit throttle arm makes the linkage simpler. Several timed and full-manifold vacuum ports cover distributor advance, a brake booster, or PCV. The carb also has a mounting provision for a GM three-wire throttle position sensor. Street guys should notice that one, because it lets the carb talk to an electronic overdrive transmission or a nitrous controller.

Those vacuum ports matter more than they look. Timed vacuum only shows up once the throttle blades open, which is what a lot of distributors want for advance. Full-manifold vacuum stays steady at idle, and that’s what a brake booster and PCV need. Having both right on the carb saves you from drilling and tapping the intake or running a tee you’ll be chasing for leaks later.

Who Should Run The VRS-4412

Racers in two-barrel classes are the obvious fit. Off the track, it makes sense on a mild street small block with a two-barrel intake, on an off-road rig, or on a period-correct hot rod that never wore a four-barrel.

It also fits anyone running a tired two-barrel who wants more tuning room without committing to a full four-barrel conversion. Before you order, confirm the flange and linkage match your intake. We’re waiting on pricing and availability from Edelbrock and will update this story when we have them.

Two barrels, 500 CFM, and the kind of tuning options that used to come only on four-barrels. Bolt one on, set the idle mixture, and feel how fast it answers your right foot.

Frequently Asked Questions

AboutCaecey Killian

Caecey Killian covers builds, installs, and product features for Car Junkie Magazine. He has spent years on the floor of the garage chasing horsepower across SBC, LS, and modern muscle platforms, and that shop time runs through every article he writes. His current CJM project is Project Street Reaper, a 1976 Camaro built around a fresh SBC 350. He is also known for Project Mighty Mouse, a 1977 Chevy Nova running a 1962 small-journal 327 SBC, with build coverage published across multiple online automotive magazines. His media background spans long-form build documentation, install coverage, and product features across the magazine and the Car Junkie Magazine YouTube channel. He writes the way he wrenches: specific, honest about the mistakes, and grounded in real garage work.

In Socials