This all-in-one cooling system kit bundles (2) bottles of Radiator/Cooling System Cleaner, (1) bottle of Cooling System Protector, and (1) bottle of Super Radiator Cooler to restore, protect, and stabilize operating temperatures on Powerstroke, Cummins, Duramax, and other heavy-duty applications.
Key Features & Benefits
Professional 2-step cleaning plus long-term protection and cooling enhancement.
Safe for aluminum, iron, rubber, and plastic components; mixes with all antifreeze types.
Helps stop rust, scale, acid formation, and foaming that lead to overheating.
Ideal for high-load, towing, and tuned diesel trucks needing extra thermal control.
Compatible with gasoline and diesel engines, including Powerstroke, Cummins, and Duramax platforms.
Super Radiator Cooler helps keep transmissions and engines cooler under severe conditions.
What’s included
Justice Brothers Cooling System/Radiator Cleaner (from RS200 2-step flush kit)
Justice Brothers Cooling System Protector/Conditioner (from RS200 kit)
Justice Brothers Super Radiator Cooler, 14 fl. oz., PN RC-22P
Flush instructions (per current product)
Use this kit as part of a full coolant service on a cool engine only. Always follow OE procedures and dispose of old coolant properly.
Drain old coolant
Open radiator petcock and block drains (if equipped) and capture used coolant.
Add cleaner and water
Close drains and fill the system with clean water.
Add the required amount of Justice Brothers Cooling System/Radiator Cleaner (1 bottle per system per instructions on the RS200 kit; this combo provides two complete flushes or one aggressive cleaning on severely neglected systems).
Circulate cleaner
Run the engine with the heater on high until it reaches normal operating temperature, then continue to circulate per RS200 directions to dissolve rust, scale, and deposits.
Drain and rinse
Shut engine off, allow to cool, and drain the system completely.
Refill with clean water and run briefly to rinse, then drain again until the drained water runs clear.
Add protector and coolant
Close all drains and refill with the correct mix of fresh antifreeze and water.
Add the Justice Brothers Cooling System Protector/Conditioner from the RS200 kit per its bottle instructions to help prevent future rust and acid formation.
Add Super Radiator Cooler
Add Justice Brothers Super Radiator Cooler at a rate of 1 quart per 20 quarts of coolant (scale the 14 fl. oz. bottle appropriately to your system capacity).
This step helps reduce operating temperatures, prevent foaming, and keep transmissions and engine cooling circuits more stable under load.
Key benefits
Restores coolant flow and heat transfer by removing rust, scale, and deposits.
Helps prevent overheating, hot spots, and costly head gasket or EGR-related issues on diesel trucks.
Protects against corrosion and acid formation to extend water pump, radiator, and heater core life.
Enhances cooling efficiency; Super Radiator Cooler is a must-have for air-conditioned vehicles and heavy towing.
Safe for all engine blocks and modern mixed-metal cooling systems; no acid and no neutralizer needed.
Warranty, returns, and policies
Backed by Justice Brothers’ product reputation and NorCal Diesel Performance’s 30-day return policy on new, unopened items.
Fast, flat-rate shipping (commonly $8 per order on these liquids; actual charge shown at checkout).
Professional installation recommended on vehicles with existing cooling system damage or unknown service history.
Possible symptoms and trouble codes of cooling system issues
Use this kit when you notice one or more of the following before parts fail:
Rising engine temps, especially under load or on grades.
Brown, rusty, or sludgy coolant in the reservoir or radiator.
Heater core not blowing hot air at idle, or temperature gauge fluctuating.
Repeated coolant loss with no obvious external leaks, or foaming in the reservoir.
Diagnostic trouble codes related to engine over-temperature or reduced power due to high ECT/EGT on late-model diesel trucks.
Restore your cooling system’s performance and protect your engine—order the Justice Brothers Cooling System Flush today from NorCal Diesel Performance!
A: Yes, the cleaner and protector contain no acid and are harmless to rubber, metal, aluminum alloy, and plastic components when used as directed. [conversation_history:0]
A: Yes, all components are compatible with gasoline and diesel engines and mix with all types of antifreeze. [conversation_history:0]
A: For working diesel trucks, a flush every 2–3 years or per OEM interval is typical, or sooner if you see contamination or overheating symptoms. [conversation_history:0]
A: Very large systems (medium‑duty trucks, RVs, fleets) may require additional cleaner or Super Radiator Cooler to match capacity; follow the “1 quart per 20 quarts of coolant” dosing guideline for the cooler. [conversation_history:0]
A: No, this kit is designed to clean and protect; severely corroded or mechanically failed components may still need replacement after flushing. [conversation_history:0]
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