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Vivid Racing Gear 
CSF Radiators 4539: High-Performance Radiator Cap
The CSF Radiators 4539 is engineered to maintain optimal pressure within your vehicle's cooling system. This radiator cap features a dual-spring loaded valve mechanism that effectively manages coolant flow, ensuring that your engine remains at the ideal operating temperature.
Functionality and Design
As pressure within the cooling system rises beyond the cap's rated PSI, the primary valve opens, allowing excess coolant to escape into the overflow tank. This action mitigates pressure spikes and prevents potential damage to the cooling system. When the engine cools and pressure decreases, the secondary valve activates, drawing coolant back from the overflow tank, which helps to eliminate air pockets and maintain system integrity.
Key Features
- Maintains optimal engine temperature by regulating cooling system pressure.
- Constructed from high-strength materials for durability and long-term reliability.
- Designed to withstand the rigors of everyday use and resist wear.
Fitment
- Dodge Nitro: 2007-2011
- Dodge Ram: 2011-2012
- Jeep Liberty: 2007-2012
- Jeep Wrangler: 2005-2011
- Ram 2500: 2011-2012
- Ram 3500: 2011-2012
Installation Notes
- Replace the existing pressure cap with the CSF 4539 to ensure compatibility and performance.
Other Part Numbers:
CSF Radiators #csf4539
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Anyone who needs a new radiator should consider buying a CSF radiator. A CSF radiator and CSF cooling system offers the best performance for driving and racing enthusiasts. If you have a faulty radiator or are looking to upgrade to a high-performance radiator, a CSF radiator will get the job done.
What is a CSF Radiator?During the last 40 years, CSF has manufactured over 10,000 different models of radiators, oil coolers, heat exchangers and condensers for Automotive, Truck, Industrial and Marine applications. Today, their products are sold in over 60 countries throughout the world. Their US Aftermarket Division stocks over 1000 models that cover over 2100 applications for all popular Import vehicles.
CSF supplies radiators and condensers that are designed to meet or exceed original equipment (OE) engineering specifications. Their plants meet ISO 9000 standards and provide parts to OE manufacturers, and to top it all off - check out their industry leading warranty. Simply put, you cannot buy, sell, install or own a better value radiator or condenser.
Why Should I Buy a CSF Radiator?A CSF radiator offers a number of benefits over the competition. Below, we explain the main reasons why you should buy a CSF radiator.
A Market Leader for over 45 YearsCSF has been a market leader for over 45 years, as the company was initially established in 1975 and have been selling CSF radiators ever since. Over time, a CSF radiator has become known for its innovative design and impeccable quality.
High-Quality Radiator TestingEvery single CSF radiator and CSF cooling system has been put through a rigorous series of tests to make sure every system is reliable and performs at a high level. In their testing lab, CSF puts in the time to make sure every product works perfectly.
Cutting-Edge TechnologyEach CSF radiator uses cutting-edge technology to bring customers the best CSF full cooling system possible. CSF racing radiators combine a high-efficiency core, advanced endtank designs, and innovative design and engineering to give our customers the most advanced and efficient radiator possible.
Get a CSF Radiator or CSF Cooling System From Vivid RacingVivid Racing carries a wide selection of CSF radiator products, including CSF cooling systems and other accessories. If you are interested in learning more or would like to purchase a CSF radiator, please contact Vivid Racing today by calling (480) 966-3040.
CSF warranty is applicable only to the original owner of the vehicle. Original paper work verifying the proof of purchase and pre-installation cooling system checklist signed by the professional installer is required to process warranty claims.
All warranty claims should be directed to the point of purchase. Due to CSF’s established agreements with Authorized CSF Warehouse Distributors, CSF is unable to handle and/or process warranty related calls/inquires from any individuals – all inquires/warranty related claims should be directed to the point of purchase or an authorized warehouse distributor.
Take care of your radiator, as under circumstances listed below the warranty will be void.
If the radiator is installed and is returned deformed (bulging tanks, warped core etc.), this is an indication that the radiator is the victim of some other problem and not the cause. The deformation is a result of the radiator being subjected to extremely high pressure and or temperature caused by any of the following reasons:Defective Pressure Cap, Defective Head Gasket, Defective Temperature gauge (incorrect readings), Defective Water Pump etc. Such units are not covered under the warranty.
If a radiator seems to have a “fit problem†there is the possibility that there is some confusion about a multi-fit radiator that might look different. Your nearest CSF WD can clarify the application, just give them a call. A perceived fit problem is not covered under warranty.
If a unit is damaged in shipping, please file a claim with the carrier. Damages caused during shipping, installation or handling are not covered under warranty.
Any repairs or alterations to the unit will automatically void the warranty.
Any form of abuse, including the use of improper coolant mixtures, damage caused by steam, corrosion etc and use on commercial vehicles voids the warranty. It is the vehicle owners’ responsibility to maintain the cooling system as specified in the owners manual.
| Sale price | None |
| Wholesale price | $54.75 |
| Shipping |
Weight: 7.00 Length: 7 Width: 7 Height: 5 |
| Product Added At | Friday 17 March, 2023 |
| Product Modified At | Monday 07 July, 2025 |
| Imported By | ETLOverride |
| Last Edited By | vendordata@vividracing.com |
| View In Admin |
| Carb Approved | Yes |
|---|---|
| Carb Number | - |
| Epa Status | N/A |
| Prop65 | Unknown |
| Carb Required | - |
| Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
|---|---|---|---|---|---|---|---|---|---|---|
| CSF Radiators | $46.40 | $66.29 | $66.29 | ? | ? | 2025-07-07 09:05:43 | ||||
| Premier WD |
Inventory Type: NonStocking |
$54.75 | $66.29 | $66.29 | ? | ? | 2025-07-10 15:13:11 |
