Flowmaster 2025 RAM 1500 3.0L American Thunder Cat-Back Exhaust System

Flowmaster's® American Thunder Cat-back true dual exhaust system for the 2025 - 2027 RAM 1500 with the 3.0-liter Standard and High Output engines gives you a great way to customize your RAM 1500 to your personality. This performance exhaust system fits both 2/4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble-free service and performance. Features include dual 3.00-inch inlet pipes leading into a custom tuned 409 stainless steel American Thunder series muffler for great sound and maximum performance. This Cat-back system includes Flowmaster’s exclusive Scavenger X-Pipe with our D-Port technology for maximum exhaust pulse velocity and helps to create a deep exhaust tone. The dual 3.0-inch mandrel-bent tailpipes exit in the stock location in the factory bumper cut outs with 4.5-inch black ceramic coated tips. Included in the tailpipe assemblies are tuned resonators that help maintain a comfortable experience in the cab. On Standard Output models this system turns the exhaust into a true dual style system like the High Output and RHO models. This will allow for better overall performance gains and will work better with any future engne modifications. Max dyno gains of 35 hp and 33 lb-ft at the rear wheels (HO models) deliver power you can feel! The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Kits include installation instructions and all necessary hardware. Backed by Flowmaster's Lifetime Limited Warranty. Fits 2025 - 2027 RAM 1500 3.0L Standard and High Output, American Thunder Cat-Back 409 stainless steel Does not fit RHO models.

• An Super 40 series muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
• Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation
• 3.0-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
• Converts Standard Output models to a true dual style system like on High Output and RHO models
• Max increases of up to 35 hp and 33 lb-ft over the stock exhaust at the wheels
• Tuned performance tones offer quality sound inside and outside of the truck
• Black ceramic coated stainless steel tips add a custom look to the vehicle
• Lifetime Limited Warranty

Upgrade the sound, appearance, and exhaust flow of your 2025-2027 Ram 1500 with the Flowmaster 818199 American Thunder cat-back true dual exhaust system. Designed for trucks equipped with the 3.0L Standard Output and High Output engines, this performance exhaust fits both two-wheel-drive and four-wheel-drive models. It is manufactured from durable 409 stainless steel for long-term corrosion resistance and dependable performance. This system does not fit RHO models.
The Flowmaster 818199 system features dual 3.00-inch inlet pipes connected to a custom-tuned American Thunder muffler and Flowmaster’s exclusive Scavenger X-Pipe with D-Port technology. This design helps increase exhaust pulse velocity, improve flow, and produce a deep, aggressive-to-moderate performance tone. On Standard Output models, the system converts the factory exhaust to a true dual configuration similar to the High Output and RHO-style layout, providing a strong foundation for future engine modifications. Dyno testing has shown gains of up to 35 horsepower and 33 lb-ft of torque at the rear wheels on High Output models.
Mandrel-bent 16-gauge 409 stainless steel tailpipes exit through the factory bumper openings and include black ceramic-coated stainless steel tips for a clean, custom appearance. Tuned resonators help control interior sound levels for a more comfortable driving experience while preserving the performance character outside the truck. The system uses factory hanger locations and connections, making installation straightforward for qualified home mechanics or professional installers. Complete installation hardware and instructions are included.
Flowmaster includes a Lifetime Limited Warranty with the 818199 American Thunder cat-back exhaust system. Verify engine configuration and vehicle application before ordering. This product is not CARB approved and may not be legal for use on pollution-controlled vehicles in all areas; check local regulations before installation.

Features:

• Deep American Thunder performance tone from a custom-tuned muffler

• Fits 2025-2027 Ram 1500 models with 3.0L Standard Output and High Output engines

• Designed for two-wheel-drive and four-wheel-drive applications

• Dual 3.00-inch mandrel-bent 16-gauge 409 stainless steel tubing improves exhaust flow and durability

• Converts Standard Output models to a true dual exhaust configuration

• Flowmaster Scavenger X-Pipe with D-Port technology increases exhaust pulse velocity

• Dyno-tested gains of up to 35 horsepower and 33 lb-ft of torque at the rear wheels on High Output models

• Tuned resonators help maintain a comfortable sound level inside the cab

• Black ceramic-coated stainless steel tips provide a custom factory-style appearance

• Uses factory hanger locations and connections for simplified installation

• Includes installation instructions and required hardware

• Backed by a Lifetime Limited Warranty

• Does not fit RHO models

Fitment:
Ram 1500 Big Horn 2025
Ram 1500 Big Horn 2026
Ram 1500 Express 2026
Ram 1500 Laramie 2025
Ram 1500 Laramie 2026
Ram 1500 Limited 2025
Ram 1500 Limited 2026
Ram 1500 Limited Longhorn 2025
Ram 1500 Limited Longhorn 2026
Ram 1500 Lone Star 2025
Ram 1500 Lone Star 2026
Ram 1500 Rebel 2025
Ram 1500 Rebel 2026
Ram 1500 Special Service 2025
Ram 1500 Tradesman 2025
Ram 1500 Tradesman 2026
Ram 1500 Tradesman HFE 2025
Ram 1500 Tungsten 2025
Ram 1500 Tungsten 2026
Ram 1500 Warlock 2025
Ram 1500 Warlock 2026