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Tri-Power 3x2 Intake Manifold for Three Two-Barrel Carburetors
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HOLLEYPART NUMBER: 510-300-521

Tri-Power 3x2 Intake Manifold for Three Two-Barrel Carburetors

$2,60895
ShippingShips on 09/16/2026
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Tri-Power Carburetor Kits
Tri-Power 3x2 Intake Manifold
  • V8 Engines with Three Two-Barrel Carburetors
  • Classic 3x2 Induction Layout
  • Aluminum Construction

    This Tri-Power intake manifold mounts three two-barrel carburetors on a V8 for classic 3x2 induction, cast in aluminum.

    Holley 300-521 Highlights:

    • For V8 engines with three two-barrel carburetors.
    • Classic 3x2 induction layout.
    • Aluminum construction.
    • BIG HORSEPOWER AND ECONOMY!

      The world famous Holley Tri- Power Carburetor system is legendary in Chevrolet circles! They were the ultimate power statement when they came factory on cars like the 1967 427 Corvette. Now you can have the same look on your Small Block Chevy! Perfect for muscle cars, street rods, classic hot rods, rat rods, trucks and more! Cruise around economically on the 325 CFM center carb, and when you decide to step on it, the two 350 CFM outboard carbs kick in for head-snapping performance!

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      Bring classic performance and head-turning style to your build with the Holley 3X2 Small Block Chevy Intake and Carburetor Kit—the ultimate setup for hot rodders and muscle car enthusiasts craving that vintage triple-carb look with modern performance and drivability. Designed specifically for small block Chevy engines, this kit delivers excellent throttle response, airflow, and power across the RPM range.

      This all-in-one package includes a polished aluminum intake manifold and three synchronized Holley two-barrel carburetors, perfectly tuned and ready to bolt on. Whether you're building a period-correct street rod or want to stand out at car shows, this setup offers both jaw-dropping looks and real performance benefits.

      Looking for a dependable Holley carb for 350 Chevy builds? This kit is a perfect match. It not only enhances airflow and fuel distribution but also simplifies tuning with Holley's trusted metering and smooth operation. It's a proven solution for anyone seeking a reliable carburetor small block Chevy setup without the complexity of piecing together components individually.

      The classic triple-carburetor system gives your engine bay a bold appearance while delivering noticeable improvements in throttle response and mid-range torque. It's an ideal option for cruisers and weekend drivers who want to pair old-school aesthetics with Holley's modern reliability.

      From nostalgic restoration projects to custom muscle builds, the Holley carb 350 Chevy enthusiasts trust is now available in one complete, easy-to-install kit. Power your passion with Holley—where tradition meets innovation.

    Part TypeIntake Manifold
    Product LineHolley 3X2 Small Block Chevy Intake and Carburetor Kit
    BrandHOLLEY
    Package Height17.0
    Package Width20.0
    Package Length26.0
    Weight25.0 PG
    Part CategoryPerformance Parts
    UsageStreet/Hi-Performance
    Number Of CarbsThree
    PositionUpper
    EmissionWithout EGR
    Rpm RangeIdle -5500
    Cylinder Head TypeStandard
    Part FitmentUniversal
    Engine Make/SizeChevy Small Block
    Vendor Part Number300-521
    Package Qty1
    Package TypeEA
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