Edelbrock 122 Supercharger Kit – 1955-1986 302-400 Small Block Chevy – #1551

Edelbrock 122 Supercharger Kit – 1955–1986 302–400 CID Small Block Chevy (#1551)

Make 500+ horsepower from your small-block Chevy with the Edelbrock 122 Supercharger Kit. Built around the proven Eaton H122 rotor assembly, this positive displacement supercharger delivers immediate, linear boost that transforms your 302–400 CID SBC into a serious street or strip powerplant. Compact enough to fit under the hood of most muscle car and street rod applications, and tested to 507 horsepower and 487 ft-lbs of torque at just 5 PSI on a 350 CID with 9.5:1 compression — this kit is the real deal.

Key Features

• Eaton H122 rotor assembly — maximum efficiency in a compact package
• Positive displacement supercharger — instant boost from idle to redline
• 507 HP / 487 ft-lbs torque tested at 5 PSI on 350 CID, 9.5:1 compression
• Designed for factory-style belt and pulley configurations — uses OEM accessory drive belts
• Secondary 6-rib supercharger pulley drive system
• Satin finish — clean, professional appearance
• Complete kit includes: supercharger assembly with Eaton internals, intake manifold, drive pulleys, belt, gaskets, and all necessary hardware
• Carburetor not included — use your carb of choice
• Manifold height: A – 8.50", B – 9.75" | Carb pad height: 9.125"
• Part Number: 1551 | Barcode: 085347015511

Performance Benefits

Positive displacement superchargers deliver boost proportional to engine RPM — meaning you get strong torque from the moment you crack the throttle, not just at high RPM. The Eaton H122 is one of the most proven rotor assemblies in the industry, offering excellent thermal efficiency and consistent output. At 5 PSI on a stock-compression 350, Edelbrock's own testing produced 507 HP and 487 ft-lbs — numbers that will transform any SBC-powered muscle car or street rod into a genuine performer.

Vehicle Fitment

Designed for 1955–1986 Small Block Chevrolet engines, 302–400 CID. Requirements:

• Long-style water pump required
• Stock-style accessory drive bracketry required
• Will NOT work with aftermarket serpentine pulley systems
• Compatible with most muscle car and street rod applications — verify hood clearance

Confirm water pump style, accessory drive configuration, and hood clearance before ordering. Carburetor not included.

Installation Notes

• Professional installation strongly recommended — involves intake manifold swap and supercharger drive setup
• Long-style water pump required — verify before ordering
• Will not work with aftermarket serpentine systems
• Select carburetor separately based on your engine's displacement and tune
• Tune/recalibrate carburetor jetting after installation for optimal air/fuel ratio

Why Buy From Ozkonic Kustomz

We stock premium performance parts from trusted brands like Edelbrock with fast fulfillment and zero compromises. Every part is sourced direct — no gray market, no counterfeits. When you're ready to make 500+ horsepower from your small-block Chevy, we have the kit ready to ship.

500+ horsepower. Bolt-on boost. Add to cart and let's build something serious.