DeWitts 6339025MC | LSX Conversion Radiator Corvette MOD. CF, Polished, Chrome Fans; 1966-1967

  • Chevrolet Corvette DeWitts LSX Conversion Radiator
  • Chevrolet Corvette DeWitts LSX Conversion Radiator
  • DeWitts 6339025MC | LSX Conversion Radiator Corvette MOD. CF, Polished, Chrome Fans; 1966-1967

    • Catalog #: 00840258
    • MPN: 6339025MC
    • $1,739.99

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Product Description

DeWitts 6339025MC - DeWitts LSX Conversion Radiator Corvette MOD. CF, Polished, Chrome Fans; 1966-1967.

This radiator is a “custom package” for all 1966-67 Corvettes with LSX engines. Inlet and outlet are on the passenger side. This radiator is designed to fit the original small block core support. This radiator features press formed end tanks, dual row core, and serpentine fins. Features dual 11” SPAL fans with 2780 CFM, your best choice for cars with A/C. We put a filler neck on the top of the radiator, passenger side, that eliminates the need for the factory Harrison overflow tank. Radiator comes with 2 rows of 1” tubes, SPAL fan, billet DeWitts cap, temp sensor in the radiator, steam line, relay, and wiring.

All LS series packages include an electric fan mounted directly to the radiator, and the electrical wiring. We also add a small connection for steam line.

Finish: Polished Radiator with Chrome Fans

Core Design: Dual Row 1 inch Tubes

Port: TL/BR

DeWitt Radiator's DIRECT FIT aluminum radiators are designed to install into the stock mounting and use the factory connections without any modifications or adapters. The term DIRECT FIT gets thrown around a lot today. Many companies offer replacement radiators and most of them require some alterations, even when they claim they fit. Each DIRECT FIT radiator starts with a USA made core, furnace brazed in our own furnace. Our cores feature two rows of cooling tubes, serpentine fin and they are epoxy free. Press formed end tanks are manually tig welded by expert craftsmen, providing the ultimate in strength and appearance. Many companies build Corvette radiators, only one specializes in it. Quality Made in the USA!

California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit

California Residents: CARB WARNING: LMPerformance will not ship any products that are not CARB approved to California. This only affects CARB related products such that affect car performance and emissions where CARB approval is required.

Legal: Some or all of these parts may not comply with Federal, State, Province, and/or Local laws, ordinances, and regulations. Buyer takes all responsibility to ensure that any modifications or upgrades that have done conform to all applicable laws and regulations for road use, especially pertaining to safety and emissions. LMPerformance is not responsible for buyer not complying with Federal, State, Province, and/or Local laws, ordinances, and regulations. This policy shall be in force for all past, current, and future purchases from LMPerformance, Inc.

* FREE SHIPPING: Please note FREE Shipping refers to shipping within the contiguous contential US only. All other locations extra.

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DeWitts Warranty Policy

LIFETIME WARRANTY DeWitts Radiator, LLC. (DRL) warrants all aluminum radiators to be free from defects in materials and workmanship for as long as you own the vehicle in which it was originally installed. This warranty is extended only to the first purchaser of any such radiator at retail. Proof of purchase must be provided in the way of a sale receipt from DRL or an authorized dealer. If the radiator is used in any racing application this warranty is considered null and void.

This warranty does not cover labor, materials not manufactured by DRL, or shipping charges. Radiators repaired or altered by parties outside DRL are not covered by this warranty. The retail purchaser is responsible for the appropriate use and application of the product. This warranty does not cover the effects of physical or chemical properties of water, steam, or other liquids used in the radiator. Radiators used without an adequate proportion of premium quality antifreeze coolant and distilled water are not covered by this warranty. DRL radiators require a correct proportion of quality coolant, which contains aluminum corrosion inhibitors in the formula and distilled water. All Corvette cooling systems must include a radiator pressure cap with the proper pressure rating.

Claims for internal damage of the engine, components, cosmetics, or user’s vehicle are not covered by this warranty. It is the responsibility of the product user to monitor engine operation and have proper detection devices installed to warn the user of overheating. Specific exemptions to this warranty include tube damage, tubes ballooning or bursting from excessive engine operating temperate or pressure, internal corrosion due to inadequate proportions of antifreeze/coolant, or damage to the radiator resulting from collision or service. DRL shall not be responsible for damages to its product or injury to persons using the product when improperly opening radiator pressure caps, burst hoses, etc. DRL shall not be responsible for injury or harm to persons or property caused by persons or vehicles using our products.

The purchaser’s remedy for breach of this warranty, exclusive of all other remedies provided by law, is expressly limited to repair or replacement of the part purchased. All products returned for warranty consideration must be returned to DRL with all transportation expenses prepaid. Upon receipt of the product, DRL will examine the product to determine the condition and validity of the claim. DRL reserves the right to repair or replace the product at our discretion. Expanded or ballooned tubes are the result of an over pressure condition and this is not covered under warranty.

Radiators which were damaged in shipping should immediately be reported to the shipping carrier as damaged, and claims of damage filed accordingly. Contact the transport carrier (UPS, truck line, etc.) for procedures in filing a damage claim with the carrier or their agent. Do not return a product damaged in shipping to Dewitts Radiator, LLC. Distilled water and premium antifreeze must be used with all aluminum radiators!

DeWitts 6339025MC LSX Conversion Radiator Review(s)

About DeWitts

History and information about DeWitts and their products.

Have you had the experience of steam pouring out of your car or maybe seen this happen to someone along the highway? Well you guessed it, a faulty radiator is the culprit and the team at DeWitts is here to make sure this never happens to your car. They realize that the radiator is an integral part of any car’s coolant system and this is especially true of a performance car that functions at top speeds. The friction that results from your car’s cacophony of moving parts is the miscreant in this case because friction results in excess heat energy. Lucky for you, this can all be avoided with a radiator from a reputable manufacturer and DeWitts fits the bill when it comes to a quality, dependable radiator.

Those owners who operate their cars at higher horsepower don’t have to worry because DeWitts understands heat load and they have test results on each radiator’s heat rejection and have published that rating comparing it to the factory unity. In the majority of cases DeWitts double row radiators are a 30% increase in heat rejection and that is no small gain and if you supplement this with an electric fan you can boost that number an additional 10%..You don’t have to worry about fit when it comes to a DeWitts radiator since they hold the official U. S. trademark for the term Direct Fit and this assures you that each and every DeWitts aluminum radiator is designed to specifically fit the listed application without the need for any modifications to your vehicle. As a bonus if you have a car that was manufactured after 1983 you will find that the DeWitts radiator are manufactured as double row radiators and consequently can hold one additional gallon of fluid over your factory installed radiator.

For those car aficionados who want even more cooling capability because of the demands of their particular driving situation the DeWitts radiators are available with 1.25 inch pipes providing approximately 10% additional cooling capability but remember a double row core, already on the radiator, is equal to a five row copper unit and is almost double the heat rejection of a single row aluminum unit. So you may find the 1.25 inch tubes totally unnecessary. An important thing to consider when choosing any product is where and how it is manufactured and you won’t go wrong with DeWitts because the aluminum radiators are made in the USA in Michigan where they can oversee 100% of the manufacturing process. They thought of quality of product first when they chose a CAB brazing furnace allowing them to produce a primo aluminum core second to none. Having fifteen years of experience building Direct Fit radiators beginning with Corvette radiators gives them a wealth of knowledge when it comes to product design and manufacturing. Give your high performance vehicle the cooling it needs for your high performance driving with a DeWitts radiator and see what a difference a cool engine can mean.

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