WindChill® direct fit radiator features three rows of cooling tubes for additional capacity and thermal transfer, Fits 70-81 F-Body Camaro/Firebird with Chevy LS V8 engine swaps, Features correct LS radiator hose inlet and outlet fitting sizes, no adapters or custom hoses required, Three row design provides 17 percent increase in cooling capacity over similar two row designs, Built in transmission cooler with 1/2-20 IFF ports included along with a 3/8-inch NPT port for temp sensor or other accessory WindChill® 70-81 F-Body LS Alum 3-Row Radiator w/ Cooler, Plain Sku # 917379-PLN Mfr. Part # 917379-PLN Condition New Brand Speedway Motors Sold Each Details
- Formed aluminum end tanks with high-flow 3-row aluminum core
- Furnace brazed construction with TIG welded end tanks, no epoxy sealer or tank crimps/O-rings to fail
- Built to OEM production dimensions to fit your 70-81 GM F-Body perfectly
- Available with OE style black finish for a low-key stock appearance under hood
- Dual pass crossflow radiator core to maximize coolant thermal transfer
- Three rows of .790-inch core tubes for extra coolant capacity and more cooling fin contact
- Approximate 17 percent increase in cooling system capacity over typical 2-row radiators
- Radiator includes integrated steam port and a 3/8-inch NPT sensor/switch port
- Billet aluminum filler neck is stronger and seals better than cast filler necks
- Features standard LS-spec 1.25” upper and 1.50” lower radiator hose fittings
- Integral transmission cooler uses standard 1/2-20 inverted flare female (IFF) fittings
Keep Your 70-81 GM F-Body LS Swap Cool Using Our WindChill® Crossflow Aluminum Radiator
The stock GM F-body radiator found in GM’s pony car fighter (Camaro and Firebird) were your typical copper/brass construction with two rows of cooling within the core. These Chevy muscle car radiators handled standard production engine cooling with ease, but once owners started turning up the performance dial cooling issues often reared their ugly head, causing overheating or other cooling system issues. Like any performance V8, the modern Chevy LS engine requires a properly sized radiator to adequately control the engine’s thermal needs.
Once you begin upping compression, adding timing, and bolting on performance parts, the stock cooling system cannot keep up with the engine’s thermal demands. Adding a larger aftermarket aluminum radiator isn’t always physically possible, so going with additional cores is your best option to rein in those engine temps. Our WindChill® 3-core direct fit aluminum performance radiator for LS powered 70-81 GM F-Body cars takes the guesswork out of building the proper cooling system for your LS-swap GM muscle car build. It is designed to work and fit perfectly with the OEM saddle mounting system and LS radiator-spec upper and lower cooling system hoses and includes a built-in automatic transmission cooler, just like the original.
Three Row Core for Increased Thermal Transfer and Greater Coolant Capacity
If the stock two rows of 1-inch cooling tubes are good, three rows of cooling tubes are better, right? Not always, but it can be. Just adding a third row or “core” to a two core radiator can often increase the thickness of the Camaro radiator core to the point there are fitment issues in the vehicle, or the core thickness becomes too much for the typical electric or engine driven fan to pull air through, negating the benefit of the additional core tube. Our WindChill® three core LS-swap radiator for GM’s 2nd gen F-Body uses .790-inch core tubes, so our three row Camaro aluminum radiator is only 7/16-inch thicker yet has a 17 percent increase in coolant capacity. The additional coolant tube in our three row radiators also provides more thermal transfer to the cooling fins that surround the core tubes, providing better cooling with minimal additional core thickness. It is the best solution for increased coolant capacity and thermal transfer efficiency without causing fitment issues in most F-Body LS-swap radiator installations.
Crafted from aluminum with stamped and dimple reinforced end tanks for the best heat transfer and the lightest weight, our 3-core aluminum performance radiator for LS V8 powered 70-81 GM F-Body is completely furnace brazed for a long life in your GM muscle car. No epoxy to crack and fail, no O-ring gasketed end tanks to leak. Just quality build construction that will last. We even offer an OE-look black coating option if you\'re looking for a factory appearance. Utilizing a dual pass 3-row radiator crossflow design, each 70-81 GM F-Body Camaro aluminum LS-swap radiator is ready for your GM LS V8-powered cooling system needs with correct LS engine specific inlet and outlet radiator hose fittings, sized at 1.25-inch at the upper left and 1.50-inch at the lower left respectively, along with a 1/8-27 NPT steam port fitting and a 3/8-inch NPT temperature sensor/switch port. Top and bottom hat channel rails allow installation of most electric fan/shroud packages. Additionally, a standard internal stacked plate style transmission cooler is included and connects to your transmission cooler lines via 1/2-20 inverted flare fittings or can be converted to Shop AN6 to 1/2-20 IFF Fittings for use with aftermarket AN transmission Shop Transmission Cooler Line Kits.
Lastly, our WindChill® 70-81 GM F-Body radiator features a strong billet aluminum radiator neck that utilizes industry standard 1-5/8-inch Shop Radiator Caps and includes a pre-installed 5/16-inch hose barb fitting for use with an Shop Radiator Overflow Tanks of your choice to help you create the right LS specific cooling system for your 70-81 GM F-Body muscle car project.
Specs Sold in Quantity Each Radiator Style Double Pass Radiator Flow Direction Crossflow Material Type Aluminum Inlet Location Upper passenger side Outlet Location Lower passenger side Row Quantity 3 Tube Size 0.790" Overall Width Range 31.00" to 31.99" Overall Width 31.50" Overall Height Range 18.00" to 18.99" Overall Height 18.63" Overall Thickness 3.49" Core Width Range 26.00" to 26.99" Core Width 26.25" Core Height Range 17.00" to 17.99" Core Height 17.13" Core Thickness 2.65" Finish Raw Cooling Fan Not Included Transmission Cooler Yes Shroud Included No Filler Neck Height 0.94" Inlet Size 1.25" Outlet Size 1.50" Tube Style Crossflow Color Natural Fan Included No Radiator Cap Included No Trans Cooler Line Connection 1/2-20 IFF Trans Cooler Adapter Fittings Included No Mounting Bracket Included No Reviews Fantastic Service Rated by Pnut on July 28, 2026
Summary: The "Windchill LS Conversion Radiator" I bought is an excellent fit and made my conversion of the cooling system effortless for my 1981 Camaro.
Yes, I recommend this product.
Related Items / Suggested Parts Alum Fan Shroud For WindChill® 70-81 F-Body Rad, Dual Fans, Plain WindChill® 70-81 F-Body LS Alum 3-Row Radiator w/ Cooler, Black AFCO 100001 High Performance Antifreeze Coolant, 1 Gallon Maxima 84916 Engine Cool-Aide Coolant Concentrate, 16 Oz DeWitts® 32-305 305 HP Coolant, 1 Gallon WindChill® Billet Aluminum Radiator Cap, 15 PSI, Natural Polished Radiator Coolant Overflow Expansion Tank, 2 x 19 In. Aluminum Universal 13 Inch Finned Radiator Overflow Tank 9 Inch By 3 Inch Stainless Steel Coolant Expansion Overflow Tank WindChill® 70-81 F-Body LS Alum 3-Row Radiator w/ Cooler Tech Support We\'re here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
