CC5559-LS-BLK GM LS Conversion/Dual-Pass Radiator for 1955-1959 Chevy Pickup Truck, Suburban 3.8/4.3/4.6/5.3/5.7L [Black]
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CHAMPION COOLING SYSTEMSPART NUMBER: 166-CC5559-LSBLK

CC5559-LS-BLK GM LS Conversion/Dual-Pass Radiator for 1955-1959 Chevy Pickup Truck, Suburban 3.8/4.3/4.6/5.3/5.7L [Black]

$29699
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GM Truck
GM LS Conversion/Dual-Pass Radiator
  • 1955-1959 Chevy Pickup Truck, Suburban 3.8/4.3/4.6/5.3/5.7L
  • Champion Core 3-Row
  • Aluminum
  • Semi Gloss Black Finish
  • Sold Individually

    Dimensions

    Champion Cooling CC5559-LSBLK Features:

    • Includes (1) 13 lb. radiator cap
    • 100-percent TIG-welded construction
    • 2 mm thick aluminum tank, fittings, and brackets
    • Billet filler neck
    • OE-style brass petcock
    • Brazed core technology with 3/8 in. spaced cooling tubes
    • Max Cool Louvered Technology with 14-16 cooling fins per inch

    Fitment Notes:

    • Designed for a GM LS engine swap on the following:
      • 1955-1959 Chevrolet Truck 3.8L 235ci L6, 4.3L 261ci L6, 4.3L 265ci V8, 4.6L 283ci V8, 5.3L 322ci V8, 5.7L 348ci V8
      • 1955-1959 Chevrolet Suburban 3.8L 235ci L6, 4.3L 265ci V8, 4.6L 283ci V8, 5.3L 324ci V8
      • 1959 Chevrolet 3B 3.8L 235ci L6, 4.6L 283ci V8
      • 1959 Chevrolet 3C 3.8L 235ci L6, 4.6L 283ci V8
      • 1959 Chevrolet 3D 3.8L 235ci L6, 4.6L 283ci V8
      • 1959 Chevrolet 3E 3.8L 235ci L6, 4.6L 283ci V8
      • 1959 Chevrolet 3F 3.8L 235ci L6, 4.6L 283ci V8
      • 1959 Chevrolet 3G 3.8L 235ci L6, 4.6L 283ci V8
    • Stay Cool with Champion Core LS-Swap Radiators

      Champion Cooling Systems Dual-Pass Radiators are a perfect choice for your LS-engine conversion vehicle. Available for most popular LS swap applications, these radiators are constructed entirely of aluminum for exceptional weight savings over stock equipment. The dual-pass flow offers superior cooling capabilities by flowing the coolant twice across the radiator. All radiators feature a 3-row core of 5/8 in. tubing to ensure proper flow when needed most. Champion Radiators are built with 100% welded seams, brazed core technology, and absolutely no epoxy. These radiators work great for both street or race cars and support approximately 600 to 800+ horsepower cooling capacity.

      Show More

      Upgrade your engine cooling system with the Champion Cooling Systems LS-Engine Conversion Aluminum Radiator — built for performance and reliability. Ideal for any modern swap, this high-quality radiator is purpose-designed for your LS engine application and ensures long-lasting thermal control without compromise.

      Crafted from full aluminum construction, it brings exceptional weight savings and superior heat-dissipation compared to traditional cast-iron or mixed-material units. With a true three-row core and dual-pass flow design, this radiator allows coolant to traverse the cooling medium twice for maximum efficiency under load. Whether you’re building a street cruiser or a high-powered track warrior, this unit supports 600 to 800+ horsepower setups with confidence.

      If you’re working on an ls swap radiator setup, this Champion solution ticks all the boxes: direct-fit for many LS-based conversions, high-capacity flow, and robust build quality. The all-aluminum assembly incorporates TIG-welded tanks, brazed core technology (0 % epoxy), and premium internals to resist warping, corrosion, or failure under elevated heat.

      We know how important it is to get your cooling right when performing an ls swap radiators upgrade. This radiator simplifies fitment, delivers industry-leading performance, and leaves nothing to chance. Choose the Champion Cooling Systems LS-Engine Conversion Aluminum Radiator and get the cooling support your build deserves — because when temperatures rise and demands increase, the right radiator makes all the difference.

    Part TypeRadiator
    Product LineChampion Cooling Systems LS-Engine Conversion Aluminum Radiators
    BrandCHAMPION COOLING SYSTEMS
    Package Height8.3
    Package Width28.7
    Package Length28.9
    Weight20.525 PG
    Part CategoryReplacement Parts
    Overall Height26.125 in.
    Outlet Size1 1/2 in.
    Radiator Cap IncludedYes
    Inlet LocationUpper passenger side
    Internal Transmission Oil CoolerYes
    Mounting TypeBracket
    Inlet Size (In.)1 1/4
    Core Height19.375 in.
    Core Thickness2 in (50.8 mm)
    Core Width21.625 in.
    Row Quantity3
    Outlet LocationLower passenger side
    Core MaterialAluminum
    Overall Width26.875 in.
    Down Flow Or Cross Flow TypeDown Flow
    Radiator FinishNatural
    Transmission Cooler1/2-20 straight, inverted flare
    Part FitmentDirect Fit
    Vendor Part NumberCC5559-LS-BLK
    Package Qty1
    Package TypeEA
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