C3 Corvette LS Swap

Radiator

• Complete aluminum radiator assembly with no plastic end tanks or rubber gaskets
• Two core radiator design with dual 1-inch-wide core tubes for maximum cooling
• Press formed end tanks fully welded to core with no gaskets or epoxy construction
• Factory-sized LS cooling hose inlet and outlet connections on passenger side
• LS steam line fitting welded into radiator end tank for your LS swap
• Direct Fit® upgrade means just that, with no modifications needed to your Corvette
• Radiators are assembled in the U.S.A. with a lifetime warranty
• Radiator core features factory style upper and lower channels
• Serpentine cooling fins deliver optimum airflow across core tubes for cooling
• Optional 4-plate transmission oil cooler available on select models
• Dual 11-inch electric 2,780 cfm cooling fan package to keep your LS cool
• Electric fan temperature switch mounted in end tank to minimize wiring
• Black Ice two-part epoxy coating available on all aluminum radiator models
• Controlled atmosphere furnace brazed core with TIG welded end tanks
• Billet DeWitts branded 15 psi radiator cap included
• Full wiring harness kit included for the pre-mounted dual fan package

Cool Your LS Swapped C3 Corvette with a DeWitts Direct Fit® and Drive Worry Free

The third generation Corvette, built from 1967-1982, is often referred to as the C3, but some call them the “Mako” generation or “Stingray” models (though technically only the 1969-1976 model years of the C3 would be labeled as such). One thing most can agree on is that they were built in large numbers, keeping their values in check, and making them one of the most popular generation of Corvettes for modifying.

The C3 Corvette is a great entry model into Corvette ownership and has seen a lot of interest in the “restomod” crowd. Restomodding a vehicle is when you modernize the drivetrain, suspension, and more while keeping the overall look subdued or stock appearing. To that end, the LS engine platform (which is used in the C5 and up generation Corvettes) has become an extremely popular engine upgrade. With various engine mount adapters, swap kits, and such, the LS engine is a drop in upgrade that we’re here to help keep cool with our Direct Fit® LS swap radiator packages.

Built to Fit Your LS Swapped Corvette with Zero Modifications to Install

The LS engine family has a couple of unique traits that require a specific radiator design. While some manufacturers make do with a universal radiator that gets a “nip and tuck” to work, that’s not how we do things with DeWitts radiators. Our Pro Series Direct Fit® C3 LS swap Corvette radiator is built using the highest quality aluminum materials, assembled, furnace brazed, and TIG welded all in our Wixom, Michigan facility (just 30 mins up I-96 from GM’s corporate headquarters at the Renaissance Center). Each radiator carries a limited lifetime warranty, is pressure tested, and carefully double wall boxed with insulation to ensure it makes the trip to you and keeps your project moving forward.

Our press formed end tanks provide an OE appearance and mean you won’t have any fitment issues, no matter if your C3 Corvette was originally a small block or big block car. Flat plate welded end tanks that our competitors use rarely have this luxury, requiring modifications to your car to fit the larger tanks and/or additional bracketry or adapters. Using a two-row core built with 1-inch-wide core tubes and serpentine cooling fins (which is equivalent to a four-core copper/brass radiator) maximizes air flow contact through the core to pull away the most heat, no matter the demand on the system.

Our Direct Fit® LS swap radiator allows you to easily bolt in the best aluminum radiator for your C3 Corvette LS swap. Not only is our radiator a hassle-free install but we have properly fitted our radiator with the correctly located LS inlet and outlet radiator hose fittings, a steam line fitting, and a pair of SPAL 11-inch cooling fans with pre-installed coolant temperature sensor to ensure your LS stays cool. Automatic transmission-equipped models feature a 4-plate internal cooler. Our Black Ice two-part epoxy coating option is a semi-gloss black finish that provides an OE-like look for those that want to keep things low key under the hood.

C3 Corvette Pro Series Direct Fit® LS Swap Radiator Options

Our C3 Corvette LS swap radiator is available for all years of C3 production, including factory small block and big block applications. Depending upon installation needs (pin mount or U-bracket) we provide the correct DeWitts radiator configuration for a hassle-free installation. The included SPAL dual 11-inch cooling fan solution, rated at 2,780 cfm, comes preinstalled, as does the fan’s temperature sensor. A complete fan wiring harness is included, as well as a billet 15 psi radiator cap with DeWitts logo.

We highly recommend our molded radiator bracket custom cushions for mounting our aluminum radiator line. While the stock bracket and cushion will work, these precisely molded cushions will hold our radiator just a bit more securely and their attractive price point make them a no-brainer add on. Our universal polished radiator overflow tanks are the perfect solution for your custom LS swap cooling system build as well. Finally, be sure to add some DeWitts High Performance coolant to your order to protect your cooling system and help it achieve maximum thermal capabilities.

DeWitts Radiator Application Guide:

1969-1972 Small Block with Pin Mount

32-6139026M (Pro Series Direct Fit®, dual 11-inch fans, natural finish, no cooler)

32-6139026A (Pro Series Direct Fit®, dual 11-inch fans, natural finish, auto trans cooler)

32-6239026M (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, no cooler)

32-6239026A (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, auto trans cooler)

1969-1972 Small Block with U-Bracket Mount (26-inch core)

32-6139070M (Pro Series Direct Fit®, dual 11-inch fans, natural finish, no cooler)

32-6139070A (Pro Series Direct-Fit™, dual 11-inch fans, natural finish, auto trans cooler)

32-6239070M (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, no cooler)

32-6239070A (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, auto trans cooler)

1969-1972 Big Block & 1973-1976 ALL (27.5-inch core)

32-6139073M (Pro Series Direct Fit®, dual 11-inch fans, natural finish, no cooler)

32-6139073A (Pro Series Direct-Fit™, dual 11-inch fans, natural finish, auto trans cooler)

32-6239073M (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, no cooler)

32-6239073A (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, auto trans cooler)

1977-1982 ALL (26.25-inch core)

32-6139077M (Pro Series Direct Fit®, dual 11-inch fans, natural finish, no cooler)

32-6139077A (Pro Series Direct Fit®, dual 11-inch fans, natural finish, auto trans cooler)

32-6239077M (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, no cooler)

32-6239077A (Pro Series Direct Fit®, dual 11-inch fans, Black-Ice finish, auto trans cooler)

 1969-1972 Specifications

1973-1976 Specifications

 Dual Fan