CSF

What CSF does

CSF Inc. is a privately held US manufacturer of aftermarket automotive cooling products, headquartered in Rancho Cucamonga, California, with a workforce of 51-100 employees. The company has operated in the cooling systems segment for over 40 years, supplying radiators, condensers, intercoolers, transmission oil coolers, inverter coolers, and pressure caps to the replacement parts market. Its catalog spans more than 3,000 SKUs, anchored on a proprietary B-Tube (Bazooka Tube) radiator tube geometry that increases internal contact surface area relative to conventional round-tube designs and is used to support higher heat-transfer performance in an OE-form-factor envelope. The company also operates a dedicated Race Division (csfrace.com) serving motorsport and high-performance applications.

CSF pursues a B2B distribution-led business model, selling through US aftermarket warehouse distributors and the two principal buying groups — The Network HQ and The Group/Automotive Parts Services Group — which collectively cover the bulk of the North American replacement-parts channel. Pricing is SKU-based on OE-replacement parts, with competitive positioning built on direct-fit design, manufacturing quality, and warranty support rather than price leadership. The product development pipeline has been active through 2023-2026, with industry-first aftermarket coverage on new model years (Ford Raptor, Ford Transit, Toyota Tacoma) and a recently launched hybrid/electric-vehicle cooling line targeting inverter and transmission cooling in HEV/PHEV applications. CSF reports no external funding, no disclosed revenue, and no AI/ML capabilities, and remains focused on the US aftermarket with selective Canadian distribution.

Name

CSF

Legal name

CSF Inc.

Website

https://csfradiators.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

1–10 employees

Short description

CSF Inc. is a US aftermarket manufacturer of automotive cooling products — radiators, condensers, intercoolers, and transmission oil coolers — using proprietary B-Tube technology, distributed through US warehouse distributors and the two major buying groups.

Ownership category

akta.pro rank

Product category

Automotive Aftermarket Cooling Components

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Automotive Heat Exchangers Manufacturing (Radiators/Condensers/Evaporators/Heater Cores) (IMACALAC)

akta.pro secondary industries

Automotive Coolant & Refrigerant Circuit Components (Pumps/Valves/Reservoirs/Expansion Devices) (IMACALAE), Automotive Refrigerant Lines, Hoses & Thermal Plumbing (IMACALAG)

Keywords

• Automotive cooling components
• Aftermarket radiators
• Vehicle condensers
• Intercoolers charge air coolers
• Transmission oil coolers

Headquarters

HQ city

Rancho Cucamonga

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Aftermarket Replacement Parts (Hardware Sales): Primary revenue is one-time sale of physical automotive cooling components (radiators, condensers, intercoolers, transmission oil coolers, inverter coolers, pressure caps) to the US aftermarket via authorized warehouse distributors and online merchants. Over 3,000 SKUs covering 40+ years of vehicle applications, with tariff-exempt product lines (e.g., radiators, condensers) offered to distributor/member networks.
2. Distributor / Program Group Sales: CSF secures approved-vendor status with buying groups and program groups (The Network HQ combining Parts Plus, Auto Pride, IAPA; The Group combining Pronto & Federated), giving members access to its product line at wholesale terms; revenue flows through member distributors and warehouses.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

CSF manufactures and sells aftermarket automotive cooling components for the US market, including radiators, condensers, intercoolers/charge air coolers, transmission oil coolers, hybrid inverter coolers, and radiator pressure caps. The company offers more than 3,000 SKUs covering over 40 years of vehicle applications, sold through authorized warehouse distributors, buying groups, and online merchants.

Product overview

CSF is a single-company manufacturer of automotive cooling products (not a software platform) offering a portfolio of seven distinct product lines: Radiators (the core line), Condensers, Intercoolers/Charge Air Coolers, Transmission Oil Coolers, Inverter Coolers (for hybrid/electric vehicles), Radiator Pressure Caps, and Custom Cooling Applications — supplemented by Combi Coolers as a sub-variant and a dedicated CSF Racing Division. The Radiators form the largest and core offering with over 3,000 cooling applications covering both import and domestic vehicles, while Condensers serve air conditioning systems, Intercoolers cool compressed intake air for turbocharged/supercharged engines, Transmission Oil Coolers manage automatic transmission fluid temperatures, and Inverter Coolers specifically address hybrid/electric vehicle thermal cycling. All products are engineered to OE-style specifications for drop-in fit and manufactured using CSF's patented B-Tube technology, which increases heat transfer surface area by approximately 15% over traditional tube systems.

Differentiator

Problem solved

Functional benefit

Brands

• CSF Race Division: CSF's racing-oriented cooling division, with a dedicated website at csfrace.com, providing performance cooling solutions and B-tube technology expertise.

Products and services

• CSF Radiators Aftermarket radiators for passenger cars, light trucks, heavy-duty trucks, and performance vehicles, built with patented B-Tube brazed aluminum tube architecture that increases heat transfer surface area by approximately 15% over traditional tubes. Includes OE-style plastic aluminum construction for modern applications and copper/brass construction for Jeep off-road.
• CSF Condensers Automotive A/C condensers built to OE specifications with drop-in fitment, featuring proprietary sub-cool design technology for higher heat rejection and more consistent cooling output across the product line.
• CSF Intercoolers / Charge Air Coolers Air-to-air intercoolers (charge air coolers) for turbocharged and supercharged vehicles, designed to cool compressed intake air to increase density and prevent overheating. Includes one of the industry's most extensive intercooler lines covering Ford, Dodge/RAM, Volkswagen, Volvo, and other platforms.
• CSF Transmission Oil Coolers Heat exchangers that manage automatic transmission fluid temperatures, manufactured with high-quality materials and patented techniques to keep transmission operating temperatures lower and extend transmission life.
• CSF Inverter Coolers Hybrid and electric vehicle cooling components engineered for the unique thermal cycling demands of HEV and PHEV powertrains, including inverter cooling for vehicles such as the Toyota Prius, Corolla Hybrid, RAV4 Hybrid, and Chrysler Pacifica Hybrid.
• CSF Radiator Pressure Caps Pressure caps for automotive cooling systems, designed to maintain proper radiator pressure and complete CSF's full cooling system product array.
• CSF Custom Cooling Applications Bespoke cooling solutions for unique or non-standard applications, offering custom cooling engineering services alongside the standard 3,000+ SKU catalog.
• CSF Race Division Racing-focused sub-brand providing high-performance cooling solutions for motorsport applications, leveraging the same B-Tube technology used in the OE-replacement line, and serving as the performance-engineering arm of CSF.

Quantifiable outcome

• ~15% increase in tube heat transfer surface area vs traditional tubes via B-Tube technology
• +3 more outcomes

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Four partnerships are on record, tiered flagship distributor access, core capability / sub-brand and core go-to-market channel.

• The Network HQflagship distributor accessChannel Partner/ Reseller/ Distributor · 13 January 2020CSF has received official approval to be a vendor to The Network HQ, whose combined membership includes Parts Plus, Auto Pride, and Independent Auto Parts of America (IAPA). Members gain access to CSF's high-quality tariff-exempt radiators and condensers, the industry's most extensive line of intercoolers, and new oil coolers - many of which are industry firsts - giving members a profit-making opportunity. CSF (Vinay Mamidi, VP & GM) explicitly framed this as a privilege and a way to reach more of the US aftermarket in 2020 and beyond.
• Automotive Parts Services Group (The Group)flagship distributor accessChannel Partner/ Reseller/ Distributor · 27 April 2018CSF received official approval to be a vendor to the Automotive Parts Services Group (The Group), whose combined membership comprises Pronto and Federated members. The Group focuses on "best in class" value and support in the auto care industry and approved CSF after a unanimous vetting decision. The partnership gives Pronto and Federated members access to CSF's high-quality radiators, condensers, and the industry's most extensive line of intercoolers. Announced by Vinay Mamidi, Vice President, Sales & Marketing of CSF.
• CSF Race Division (csfrace.com)core capability / sub-brandStrategic or Co-development Partner · 16 February 2017CSF operates a dedicated racing division at csfrace.com, led by Ravi Dolwani (Head of CSF Race Division), which supports motorsports cooling R&D and provides the technical validation and "B-Tube" expertise referenced across the OE-replacement product line. The Race Division publicly explains CSF's B-tube technology and helps position CSF as a performance brand alongside its aftermarket business.
• Authorized CSF Warehouse Distributors (network)core go-to-market channelChannel Partner/ Reseller/ DistributorCSF's primary route to market. All warranty claims are contractually directed back to the point of purchase or an authorized CSF Warehouse Distributor; CSF itself does not process warranty calls from individuals. Distributors order through the Nexpart B2B portal, and the "Where to Buy" page maps consumers to local distributor/dealer locations and online merchants.

Scale indicators6 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Denso: World's largest Tier-1 automotive thermal management supplier, supplying OE radiators, condensers, and inverter coolers to most major OEMs (including many vehicles that CSF addresses in the aftermarket). Provides the OE benchmark CSF competes against on fit and performance.
• MAHLE: Global Tier-1 automotive supplier with a large thermal management product portfolio (radiators, condensers, intercoolers, electric coolant pumps). Comparable technology stack to CSF but operates as a broad OE and aftermarket incumbent across global vehicle platforms.
• Modine Manufacturing: Large diversified thermal management manufacturer serving automotive, commercial vehicle, industrial, and data center markets. Overlaps with CSF in automotive radiators and cooling modules but operates at much greater scale across many end markets.
• Valeo: Global Tier-1 supplier with a thermal systems business covering HVAC, front-end modules, and powertrain cooling for ICE, hybrid, and electric vehicles. Competes with CSF in condenser and cooling technology and is a key OE reference for the same vehicle platforms.

Direct peers

• Spectra Premium: Canadian-based aftermarket manufacturer of radiators, condensers, intercoolers, and other cooling components for cars and trucks. Directly comparable to CSF as an automotive aftermarket cooling specialist with similar SKU breadth and distributor-first go-to-market.
• OSC Automotive Products: US aftermarket supplier of radiators, condensers, and related cooling components. Directly competes with CSF in the same US warehouse distributor channel and on similar passenger and light-truck SKUs.
• APDI (Automotive Parts Distribution International): Aftermarket supplier of radiators, condensers, and other cooling components distributed through US warehouse distributors. Comparable to CSF as a competing private-label and brand-label cooling parts vendor in the same US aftermarket channel.
• Nissens (NRF): Danish manufacturer of aftermarket thermal management products (radiators, condensers, intercoolers, oil coolers) with broad European and global distribution. Comparable to CSF in product scope (radiators, condensers, charge air coolers) and in operating as an aftermarket cooling specialist.
• Koyorad: Japan-based manufacturer of aftermarket and OE automotive radiators, intercoolers, and oil coolers, with a strong performance/racing sub-brand. Highly comparable to CSF in product mix and in serving both daily-driver replacement and motorsport segments.

Others

• CSF Race Division: CSF's own racing-focused sub-brand. Included as a self-reference to flag that CSF's motorsport sub-brand (B-tube performance radiators, intercoolers) competes thematically with other performance cooling brands such as Mishimoto and Koyorad's racing line.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/csfrace
• YouTubeyoutube.com/user/CSFracing
• Facebookfacebook.com/CSFradiators
• LinkedInlinkedin.com/company/csf-radiators
• Instagraminstagram.com/csf_radiators

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CSF