CSF FR-S/BRZ/86/GR86 All-Aluminum Filler Neck w/1.4 bar High Pressure Radiator Cap

The CSF FR-S/BRZ/86/GR86 All-Aluminum Filler Neck with a 1.4 bar High Pressure Radiator Cap represents a significant upgrade over the factory-installed plastic filler neck. Designed specifically for the Scion FR-S, Subaru BRZ, Toyota 86, and GR86 models within the specified year ranges, this component enhances both the durability and performance of your vehicle’s cooling system.

Manufactured from high-grade aluminum, the filler neck is 100% TIG-welded, ensuring exceptional structural integrity and resistance to heat and pressure. Its mirror-polished finish not only provides a refined aesthetic but also contributes to corrosion resistance, extending the component's lifespan under demanding operating conditions. The included radiator cap is a high-quality “mini style” unit, rated at 1.4 bar, which is engineered to maintain optimal cooling system pressure and improve overall thermal efficiency.

Installation is straightforward and requires no modifications, allowing for a seamless drop-in replacement that can be completed in under five minutes. This ease of installation makes it an ideal choice for both professional mechanics and experienced enthusiasts seeking to enhance their vehicle’s cooling reliability without extensive downtime.

Key Features

• All-aluminum construction: Provides superior strength and heat dissipation compared to OEM plastic filler necks.
• 100% TIG-welded: Ensures a robust, leak-free assembly with high precision craftsmanship.
• Mirror polished finish: Enhances corrosion resistance and offers a premium appearance.
• 1.4 bar high-pressure radiator cap: Maintains optimal system pressure for improved cooling performance.
• Integrated 1/8 NPT sensor port: Allows for easy installation of aftermarket temperature or pressure sensors, with a preinstalled optional plug included.

Compatibility and Applications

OEM Part Numbers

• Subaru: 45151CA000
• Subaru: 45151CC000
• Toyota: SU003 03939
• Toyota: SU003-03939
• Toyota: SU00303939
• Toyota: SU003 09080
• Toyota: SU003-09080
• Toyota: SU00309080

Warranty Information

Cooling Systems and Flexibles, Inc. (CSF) stands behind the quality and reliability of its high-performance cooling components. This filler neck is covered under a comprehensive 2-year warranty for the original purchaser, provided the product is used under normal operating conditions and installed in the original vehicle. For full warranty details and terms, please visit our Warranty Page.

SKU# 8044 Warranty Term: 2 years

In summary, the CSF All-Aluminum Filler Neck with 1.4 bar High Pressure Radiator Cap is a precision-engineered solution designed to improve the durability, performance, and serviceability of your vehicle’s cooling system. Its robust aluminum construction, superior welding quality, and high-pressure cap ensure reliable operation under demanding conditions, making it an essential upgrade for owners of the FR-S, BRZ,

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.