CSF
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.
- Company typePrivate
- Founded1980
- HeadquartersRancho Cucamonga, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
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.
CSF firmographics
Firmographics- 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
CSF industry classification
Industry- 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
Where CSF is headquartered
LocationHeadquarters
- HQ city
- Rancho Cucamonga
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
CSF business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- 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.
- 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
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Aftermarket replacement parts sold through authorized distributors and online merchants at "quality and affordable" price points; "tariff-exempt" for select radiator/condenser lines. |
Go-to-market motion3 records
Distribution channels5 records
Marketing channels6 records
CSF product offering
Product offeringCore 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
Companies that use CSF
Customer profileSegments5 records
Ideal customer profiles4 records
CSF technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
CSF partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered flagship distributor access, core capability / sub-brand and core go-to-market channel.
- The Network HQflagship distributor accessCSF 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 accessCSF 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-brandCSF 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 channelCSF'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
CSF competitors and assessment
Company assessmentBroad 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
CSF social profiles
Digital presenceCSF financial estimates
Financial estimateRevenue estimate
Valuation estimate
CSF leadership team
Management profileNumber of profiles
Profiles2 records
CSF funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CSF M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CSF
What does CSF do?
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.
Is CSF a public or private company?
CSF is a private company. It is classified as unknown and is currently operating.
When was CSF founded?
CSF was founded in 1980. It employs 1 to 10 people.
Where is CSF based?
CSF is headquartered in Rancho Cucamonga, United States, in the North America region.
How does CSF make money?
Two revenue lines are on record. Aftermarket Replacement Parts (Hardware Sales) is the primary driver. The others are distributor / Program Group Sales.
Who are CSF's main competitors?
Broad incumbents on record are Denso, MAHLE, Modine Manufacturing and Valeo. Direct peers are Spectra Premium, OSC Automotive Products, APDI (Automotive Parts Distribution International), Nissens (NRF) and Koyorad. CSF Race Division is listed as an others.
Does CSF have an API?
No public API is recorded for CSF.
What industry is CSF in?
CSF's product category is Automotive Aftermarket Cooling Components. Its primary akta.pro industry code is IMACALAC, Automotive Heat Exchangers Manufacturing (Radiators/Condensers/Evaporators/Heater Cores), with a secondary code of IMACALAE, Automotive Coolant & Refrigerant Circuit Components (Pumps/Valves/Reservoirs/Expansion Devices). Its NAICS code is 33341 and its SIC code is 3585.