Cataclean Enters Diesel Market With New Diesel Exhaust System & DPF Cleaner

Holley Performance Brands (NYSE: HLLY) launched Cataclean Diesel Exhaust System & DPF Cleaner on April 16, 2026, expanding Cataclean into the diesel segment.

Rhea-AI Summary

Holley Performance Brands (NYSE: HLLY) launched Cataclean Diesel Exhaust System & DPF Cleaner on April 16, 2026, expanding Cataclean into the diesel segment. The lab-tested formula reported up to 25% improvement in DPF performance and up to 50% reduction in hydrocarbons; results may vary by vehicle.

The product targets diesel truck and commercial drivers and supports Holley’s American Performance chemicals expansion strategy in a recurring maintenance category.

Positive

• DPF performance improvement up to 25%
• Hydrocarbons reduced up to 50%
• Strategic expansion into diesel maintenance market

Negative

• None.

Argus Apr 16 session

-0.65% close to close Open Argus

Details

News Market Reaction – HLLY

On Apr 16, the day this news came out, HLLY closed 0.65% below the previous close.

Data tracked by StockTitan Argus for the Apr 16 session.

Key Figures

DPF performance improvement: up to 25% Hydrocarbon reduction: up to 50%

DPF performance improvement

up to 25%

Cataclean Diesel Exhaust System & DPF Cleaner controlled testing

Hydrocarbon reduction

up to 50%

Cataclean Diesel Exhaust System & DPF Cleaner controlled testing

Historical Context

5 past events · Latest: Apr 09

5 events

1. Apr 09

   Product launch

   24h Move

   +2.9%

   Introduced modular Swap Essentials kits to simplify modern engine swaps.

2. Mar 20

   Acquisition

   24h Move

   -6.8%

   Acquired HRX racewear brand to expand Safety & Racing portfolio.

3. Mar 04

   Earnings

   24h Move

   -12.4%

   Reported 2025 sales and earnings growth with improved leverage metrics.

4. Feb 18

   Earnings date

   24h Move

   +4.8%

   Announced schedule and access details for Q4 and full-year 2025 results.

5. Jan 22

   Brand strategy

   24h Move

   -0.5%

   Renamed core vertical to American Performance reflecting demand shifts and data.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

diesel particulate filter, catalytic converter, turbocharger, oxygen sensors, +1 more

5 terms

diesel particulate filter technical

"components, including the diesel particulate filter (DPF), catalytic converter,"

A diesel particulate filter is a device in a diesel vehicle’s exhaust system that traps soot and tiny solid particles, like a coffee filter catching grounds from a pot, then periodically cleans itself or is cleaned to avoid clogging. For investors, it matters because filter performance and durability affect vehicle operating costs, regulatory compliance, resale value, and demand for parts and services—factors that influence manufacturers’, fleet operators’ and suppliers’ revenues and liabilities.

catalytic converter technical

"filter (DPF), catalytic converter, turbocharger, oxygen sensors, injectors"

A catalytic converter is an exhaust system component that uses a coating of precious metals to trigger chemical reactions that turn harmful vehicle emissions—like carbon monoxide, nitrogen oxides and unburned hydrocarbons—into less harmful gases. Investors care because rules, raw-material costs, theft risk and changes in vehicle technology can affect automakers, parts suppliers and mining companies’ revenues and compliance costs; think of it as a filter that controls pollution and price exposure.

turbocharger technical

"filter (DPF), catalytic converter, turbocharger, oxygen sensors, injectors"

A turbocharger is a mechanical device attached to a vehicle engine that uses the engine’s exhaust gases to spin a small turbine, forcing extra air into the combustion chamber so the engine makes more power from the same size. Investors care because turbochargers affect fuel efficiency, emissions compliance, vehicle performance and parts demand—factors that influence sales, production costs and aftermarket revenue much like adding a compact booster to make machinery work harder and more efficiently.

oxygen sensors technical

"catalytic converter, turbocharger, oxygen sensors, injectors and cylinder heads"

Oxygen sensors are devices that measure the amount of oxygen in a gas or liquid—think of them as a thermometer that reads oxygen instead of temperature. They are used in medical equipment (to monitor patient blood oxygen), industrial systems (to control combustion or emissions), and consumer devices. Investors watch them because improvements, cost reductions, regulatory approvals, or strong demand can drive sales, margins, and competitive position in healthcare, automotive, and industrial markets.

cylinder heads technical

"oxygen sensors, injectors and cylinder heads, helping support system"

Cylinder heads are the metal covers bolted to the top of an engine’s cylinders that house valves, spark plugs or injectors, and passages for air, fuel and coolant. They determine how efficiently an engine breathes and runs, so for investors they signal manufacturing complexity, repair costs, product performance and profitability—think of them as the engine’s braincase that affects power, fuel use and long‑term reliability.

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Launch expands Cataclean into the diesel market and supports Holley’s American Performance chemicals expansion strategy in a large maintenance category

NASHVILLE, Tenn., April 16, 2026 (GLOBE NEWSWIRE) -- Cataclean®, the trusted brand in fuel and exhaust system cleaning solutions, in the Holley Performance Brands (NYSE: HLLY) portfolio, today announced the launch of Cataclean® Diesel Exhaust System & DPF Cleaner, a new diesel-specific emissions system treatment that expands the Cataclean line into a new vehicle segment, bringing the brand to diesel truck owners, commercial vehicle operators and other diesel drivers seeking solutions to help restore emissions system performance and efficiency, while also supporting Holley’s American Performance chemicals expansion strategy.

Cataclean Diesel Exhaust System & DPF Cleaner is designed to benefit diesel engines and reflects an important customer insight: diesel vehicle owners often prefer diesel-specific formulations over multi-fuel additives when addressing emissions-related issues. The product is engineered to help clean critical diesel exhaust and fuel system components, including the diesel particulate filter (DPF), catalytic converter, turbocharger, oxygen sensors, injectors and cylinder heads, helping support system regeneration, fuel economy and overall performance.

“Cataclean is one of the strongest and most recognized brands in our chemicals portfolio, and this launch extends that brand into an attractive new market,” said Nick Hite, SVP American Performance, Holley Performance Brands. “Cataclean Diesel Exhaust System & DPF Cleaner gives diesel customers a solution designed specifically for their vehicles, while supporting our broader American Performance chemicals expansion strategy with a product that fits naturally into a large category with recurring maintenance demand and strong retail relevance.”

Cataclean Diesel Exhaust System & DPF Cleaner is a lab-tested formula engineered for today’s emissions-challenged diesel vehicles. In controlled testing conditions, the product demonstrated up to 25% improvement in DPF performance and up to 50% reduction in hydrocarbons. Results may vary by vehicle condition, mileage and emissions system health.

The launch builds on Holley’s broader expansion of its automotive chemicals portfolio, which includes which includes NOS Octane Booster, Holley Carburetor Cleaner and Baer Spray Brake Cleaner.

For more information on Cataclean Diesel, click here.

For more Holley company news, click here.

Forward-Looking Statements
Certain statements in this press release may be considered “forward-looking statements” within the meaning of the “safe harbor” provisions of the United States Private Securities Litigation Reform Act of 1995.  Such forward-looking statements are subject to risks, uncertainties, and other important factors which could cause actual results to differ materially from those expressed or implied by such forward-looking statements, including but not limited to Holley’s ability to (1) execute our business strategy, including monetization of services provided and expansions in and into existing and new lines or segments of business; (2) grow and manage growth profitably; (3) maintain relationships with customers and suppliers; (4) successfully integrate acquisitions or achieve the expected synergies from such acquisitions, including anticipated growth opportunities and operational efficiencies; (5) successfully design, develop, and market new, effective, and safe products, (6) expand into new markets or segments; (7) compete effectively in our market; (8) maintain and strengthen demand for our products and brands; (9) maintain successful and profitable partnerships; (10) achieve expected returns on investments; (11) predict and respond to customers’ changing preferences; and (12) the other risks and uncertainties set forth in the Annual Report on Form 10-K for the year ended December 31, 2025 filed with the U.S. Securities and Exchange Commission (“SEC”) on March 16, 2026, and in any subsequent filings with the SEC.

About Cataclean
Cataclean is a recognized emissions system cleaning brand in the Holley Performance Brands portfolio, offering solutions designed to help restore vehicle performance and improve system efficiency.

About Holley Performance Brands

Holley Performance Brands (NYSE: HLLY) leads in the design, manufacturing and marketing of high-performance products for automotive enthusiasts. The company owns and manages a portfolio of iconic brands, catering to a diverse community of enthusiasts passionate about the customization and performance of their vehicles. Holley Performance Brands distinguishes itself through a strategic focus on four consumer vertical groupings, including American Performance, Modern Truck & Off-Road, Euro & Import, and Safety & Racing, ensuring a wide-ranging impact across the automotive aftermarket industry. Renowned for its innovative approach and strategic acquisitions, Holley Performance Brands is committed to enhancing the enthusiast experience and driving growth through innovation. For more information on Holley Performance Brands and its dedication to automotive excellence, visit https://www.holley.com.

Photos accompanying this announcement are available at https://www.globenewswire.com/NewsRoom/AttachmentNg/329f1f5e-1fad-4921-bceb-5262a3b53da8

Investor Relations Contacts:
Anthony Rozmus / Neel Sikka / Jenna Kozlowski
Solebury Strategic Communications
203-428-3324
holley@soleburystrat.com

Media Relations Contacts:
Nathan Espinosa/Patrick Curtin
Kahn Media
818-881-5246
Holley@KahnMedia.com

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What is Cataclean Diesel Exhaust System & DPF Cleaner announced by Holley (HLLY) on April 16, 2026?

It is a diesel-specific emissions and DPF treatment designed to restore performance and efficiency in diesel vehicles. According to the company, lab tests showed up to 25% DPF improvement and up to 50% hydrocarbon reduction, with results varying by vehicle.

How does Cataclean Diesel claim to impact DPF performance and emissions for HLLY shareholders?

The company reports lab-tested benefits including up to 25% DPF improvement and up to 50% hydrocarbon reduction in controlled tests. According to the company, real-world results will depend on vehicle condition, mileage, and emissions system health.

Which customers does Holley (HLLY) target with the new Cataclean Diesel product?

Holley targets diesel truck owners, commercial vehicle operators, and diesel drivers seeking diesel-specific maintenance solutions. According to the company, the launch supports its American Performance chemicals expansion into a large, recurring maintenance category with retail relevance.

Will Cataclean Diesel be part of Holley’s American Performance chemicals portfolio and why does that matter for HLLY?

Yes; the product is positioned within Holley’s American Performance chemicals strategy to broaden recurring maintenance offerings. According to the company, it fits a large category with strong retail relevance and complements existing chemical products.

Are the Cataclean Diesel test results guaranteed for all vehicles as stated by Holley (HLLY)?

No; the company cautions results may vary by vehicle condition, mileage, and emissions system health. According to the company, the lab-tested figures reflect controlled conditions and individual outcomes can differ in real-world use.