A/B/C-910 2020-2026 Explorer ST 2.5in Catback Polished Tips

Thermal R&D 2.5 Inch Catback Exhaust Designed for the 2020-2026 Ford Explorer ST

The Thermal R&D A/B/C-910 is a complete 2.5 inch catback exhaust system built specifically for the 2020-2026 Ford Explorer ST 3.0L EcoBoost. Full 2.5 inch T304 stainless steel mandrel-bent tubing runs from the OEM catalytic converter outlets to the rear bumper, increasing exhaust flow and delivering a deeper, more aggressive note compared to the acoustically muted factory system. True Helmholtz Technology is built into the muffler to cancel the resonance frequencies that cause drone at highway speeds, so owners can cruise at 70 to 80 mph without cabin noise fatigue while still hearing the twin-turbocharged 3.0 liter engine pull hard under throttle. The system uses all OEM hanger locations, requires no cutting or welding, and exits through 4 inch dual polished angle-cut tips sized to fit within the factory Explorer ST rear valance. Manufactured in Lancaster, California with a Limited Lifetime Warranty to the original vehicle owner.

Key Features

• 2.5 Inch T304 Stainless Steel Mandrel-Bent Tubing — Full 2.5 inch diameter throughout for improved flow and deeper tone
• True Helmholtz Technology — Eliminates highway drone at cruising speeds
• 4 Inch Dual Polished Angle-Cut Tips — Sized to fit the factory Explorer ST rear valance without modification
• Mill Finish Tubing and Center Muffler — Clean, factory-plus appearance
• Brushed Finish Rear Muffler — Premium contrast and long-term durability
• Direct Bolt-On Installation — Uses OEM hanger locations, no cutting or welding required
• Emissions Legal — Connects downstream of OEM catalytic converters, no check engine light
• Limited Lifetime Warranty — To the original vehicle owner, non-transferable, excludes racing and commercial use
• Made in the USA — Manufactured in Lancaster, California

What's Included

• Complete 2.5 inch catback exhaust system (front mid-pipes, center section, rear muffler)
• 4 inch dual polished angle-cut tips
• All necessary OEM-style clamps and hardware
• Thermal R&D installation instructions

Specs

Fitment

Frequently Asked Questions

Does the A/B/C-910 fit my 2024 or 2025 Ford Explorer ST?
Yes. The A/B/C-910 fits all 2020-2026 Ford Explorer ST models with the 3.0L EcoBoost V6. This is an ST-only system and does not fit the base, XLT, Limited, or Platinum Explorer trims.

What is the difference between the A/B/C-910 catback and the A/B/C910 downpipe-back system?
The A/B/C-910 catback connects at the OEM catalytic converter outlets and replaces only the cat-back section. The A/B/C910 downpipe-back system replaces everything from the OEM catalytic converter outlets forward through the mid-pipes, offering more complete flow improvement. Both use 2.5 inch T304 stainless tubing and True Helmholtz Technology for drone-free performance.

Will there be drone on highway drives?
No. True Helmholtz Technology cancels the resonance frequencies that cause drone at 65 to 80 mph. Owners report holding normal conversations at highway speeds without raising their voice, while still hearing a noticeably deeper, more aggressive tone under throttle.

How does this compare to the 3 inch Explorer ST system in terms of sound?
The 2.5 inch A/B/C-910 is quieter and less aggressive than the Thermal R&D 3 inch Explorer ST system. It is the preferred choice for daily drivers who want improved sound without making the vehicle loud or obnoxious. Both systems are drone-free at highway speeds.

Does installation require cutting or welding?
No. The A/B/C-910 is a direct bolt-on replacement using all OEM hanger locations. All necessary clamps are included. No cutting, welding, or drilling is required.

Will this affect my check engine light?
No. The system mounts at the OEM catalytic converter outlets and does not alter the catalytic converters or upstream emissions equipment. No check engine light should result from a proper installation on a stock Explorer ST.

Are the polished tips included or are they an upgrade?
The 4 inch dual polished angle-cut tips are included standard with the A/B/C-910. If you prefer black ceramic coated tips, look at the A/B/C910-C downpipe-back system or contact us about tip options.

What warranty does the A/B/C-910 carry?
Thermal R&D covers this system with a Limited Lifetime Warranty to the original vehicle owner, non-transferable. The warranty covers defects in materials and workmanship and does not apply to racing, commercial use, or improper installation. Manufactured in Lancaster, California.

Does the A/B/C-910 fit the 2026 Explorer ST?
Yes, the A/B/C-910 is listed as compatible with 2026 Explorer ST models. However, if your 2026 Explorer ST is equipped with a Gasoline Particulate Filter (GPF), contact us to verify fitment before ordering, as GPF-equipped vehicles may require additional consideration.

Does installing an aftermarket exhaust void my Explorer's warranty?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty solely because you installed an aftermarket exhaust. A dealer must demonstrate that the aftermarket part caused the specific failure before denying warranty coverage.

Installation Instructions

Apply penetrating fluid to all factory exhaust hangers and clamps before beginning. With the vehicle safely elevated on jack stands, disconnect the stock catback at the OEM catalytic converter outlet clamps and unclip the hanger isolators working from rear to front. Remove the factory catback system. Install the A/B/C-910 front mid-pipe section first, connecting at the OEM catalytic converter outlets and leaving clamps hand-tight. Route the rear muffler and tip section onto the OEM hanger rods, centering the dual polished tips within the factory Explorer ST rear valance opening. Torque all clamps to specification, start the engine, and inspect all joints for leaks. No cutting, welding, or drilling is required.

WARNING: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer and reproductive harm. For more information, go to www.p65warnings.ca.gov.