Gibson 618815 Stainless Steel 2.5in Single Cat-Back Exhaust for Toyota 4Runner 2004-2024 (4.0L)

Fits 2004-2024 Toyota 4Runner models with the 4.0L engine, including Limited, SR5, TRD Pro, and TRD Off-Road trims.

The Gibson Single Side Exhaust system (MPN 618815) is engineered to maximize low-end torque and horsepower, specifically targeting the 1800 to 3000 RPM range. This makes it an ideal upgrade for towing, hill climbing, and improved passing power. Dyno tests show average gains of 10-15 horsepower and 15-20 lb-ft of torque. The system exits behind the rear tire, providing an aggressive exterior sound while maintaining one of the quietest cabin experiences available for performance exhaust systems.

This system is built from 2.5-inch mandrel-bent stainless steel tubing to ensure consistent flow and long-term corrosion resistance. It features the Gibson Superflow™ muffler, a baffled and chambered design that uses no internal packing to blow out or deteriorate. The kit is finished with a polished stainless steel slash-cut tip and installs easily using factory-style hangers and included hardware.

• 2.5-inch mandrel-bent stainless steel tubing
• Superflow™ baffled/chambered muffler for consistent performance
• Polished stainless steel slash-cut tip
• Direct bolt-on installation; no welding required
• Includes all necessary hardware and factory-style hangers
• Minimal interior drone with an aggressive external profile
• Manufacturer Part Number: 618815
• Lifetime Limited Warranty