Universal SBC Double Pass Radiator Kit, Dual Electric Fans, 31 In

Our line of universal Chevy radiators makes it easy for budget-minded racers to get a professional-quality, no compromises aluminum racing radiator. 

Performs Under Pressure

Constructed of lightweight, 100% aluminum, we furnace braze the radiator assembly for maximum durability and performance, no epoxy and gaskets here! Epoxy acts as an insulator, causing radiators to heat unevenly, and this stress combined with the vibration from racing can break epoxy seals and leak or separate over time. Furnace-brazing minimizes fatigue from the rapid heating and cooling cycles. Since all the metal parts are fused together with a metal joint, they conduct heat evenly between the tanks and the rest of the assembly, preventing uneven expansion between the fused pieces, keeping the joint strong. 

We welded a billet filler neck for a strong seal under high pressures that will outperform cast filler necks with an industry standard 1-5/8” inner cap diameter and a 1/8” NPT overflow port. 

Maximum Cooling Performance

Our double-pass design uses two rows of 1” wide aluminum tubes, cooling the same as five rows of copper tubes. The double-pass design flows the coolant twice through the radiator, allowing longer time in the airflow and lowering your coolant temperatures by 10-20 degrees. Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance.

A dense fin structure adds an additional layer of strength to the support tubes, better directs air flow and has more area to transfer heat. The core is 2.25”, a perfect balance of maximizing directed airflow and heat transfer. The cross-flow design allows the radiator cap to be mounted on the low-pressure (suction) side of the system, minimizing pressure on the neck assembly, especially in high-RPM usage. This radiator is built for one purpose, cooling your engine. No transmission cooler maximizes cooling efficiency.

Features

• A professional quality, lightweight, all-aluminum racing radiator at a budget-friendly price
• Furnace-brazed construction is more durable and improves performance vs. epoxy and gasket construction
• Two-rows of 1” aluminum tubes cool better than 5 rows of traditional copper tubes
• Double pass design lowers coolant temperatures 10-20 degrees with 2.25” core 
• Dense fin structure improves airflow and adds rigidity
• Billet aluminum filler neck guarantees a long-lasting seal under high pressures
• Widths of 31-inch available, 19 inches tall to fit a variety of applications
• Basic design for universal fit and focus on engine cooling 
• 1.5” passenger side upper inlet, and 1.75” passenger side lower outlet

Kit Includes:

• (1) Speedway 31 In. Double Pass Aluminum Racing Radiator, S/B Chevy
• (1) Aluminum Fan Shroud for 31 Inch Radiator, Dual Electric Fans
• (2) Speedway Universal Electric Radiator Cooling Fans, 12 Inch
• (2) Fan/Shroud/Cooler Mounting Kits
• (1) Round Chrome Radiator Pressure Cap, 15 Lbs

Aluminum Fan Shroud for 31 Inch Radiator, Dual Electric Fans

• Designed to concentrate airflow to your cooling fan
• Composed of high-quality aluminum, it is lightweight and easy to drill through for a custom fit
• Complete with rubber flaps for higher speeds when airflow through the grille increases
• Instruction sheet
• Bolt-on installation
• Shroud made of 16 gauge aluminum
• 8 rubber flaps
• Fits dual 11" or 12" fans
• Measures 18-3/4" tall x 25-3/4" wide x 1/2"deep

Speedway Universal Electric Radiator Cooling Fans, 12 Inch

• Speedway Motors universal fans provide efficient airflow
• Computer-balanced blades, heavy-duty one-piece construction, and a complete mounting kit included
• Provide the cooling power you need with reduced noise and vibration
• Reversible, so they can be configured as pushers or pullers
• 12 inch diameter
• 2-3/8 inch wide
• S-blade style
• 10 blades
• 750 CFM maximum airflow

Fan/Shroud/Cooler Mounting Kit

• Consists of 4 threaded plastic bolts 3/16" diameter and approx. 8-1/2" long
• Includes 4 1/4" spacers, 8 thin washers, and 4 metal wingnuts
• Works great for mounting your fan shroud, electric fan, or oil cooler directly to your radiator

Round Chrome Radiator Pressure Cap, 15 Lbs

NOTE: While this cap is chrome plated for durability, it may not meet standards of a premium, "show" quality finish.

• 15 psi pressure rating
• Chrome finish
• 1-1/2" O.D. interior sealing surface
• 2-2/3" exterior O.D.
• Fits most standard radiator necks 

Fan Wiring Diagram (PDF)