Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is engineered to unlock the true voice and performance of your Nissan Titan. Built specifically for 2004-2015 Nissan Titan pickups equipped with the 5.6L engine, this complete cat-back kit fits all cab and bed configurations except the Crew Cab/Long Bed. As part of the legendary American Thunder series, it delivers a proven combination of improved horsepower, added torque, and an aggressive yet controlled exhaust note that transforms the driving experience without overwhelming the cabin.
Key Benefits
At the heart of the system is the Flowmaster 70 Series Big Block performance muffler, tuned to produce a moderate-to-aggressive performance sound level both inside and outside the truck. Flanged dual inlet pipes feed directly into the muffler, which exits into a smooth 3.00-inch mandrel-bent tailpipe. Mandrel bending preserves full pipe diameter through every curve, promoting efficient exhaust flow that helps free up power the factory system leaves on the table.
Durability is built in from front to back. The kit is manufactured from tough 409S stainless steel to resist corrosion and stand up to the demands of everyday driving and towing. The single tailpipe exits in the stock location on the passenger side and is finished with a large 3.50-inch diameter polished stainless steel Flowmaster exhaust tip, adding a clean, purposeful look that complements the deeper tone.
Highlights
- Fits 2004-2015 Nissan Titan with the 5.6L engine, all cab/bed setups except Crew Cab/Long Bed
- Constructed from durable 409S stainless steel for long-term corrosion resistance
- Flowmaster 70 Series Big Block muffler included for aggressive/moderate sound
- 3.00-inch mandrel-bent tailpipe with 3.50-inch polished stainless steel Flowmaster tip
- Single tailpipe exits in the factory location on the passenger side
- CARB (California) compliant with Emission Code 5
Sound & Performance
Designed for drivers who want more than stock but don’t want a droning highway ride, the American Thunder system strikes a refined balance. Expect improved horsepower and torque paired with a moderate performance sound that comes alive under throttle while remaining comfortable at cruise. It’s the ideal upgrade for Titan owners chasing added power, a stronger exhaust note, and a factory-quality appearance.
Fitment & Installation
This cat-back kit is a true bolt-on upgrade. Flanged connections, instructions, and all necessary hardware are included to make installation straightforward for a confident DIYer or professional shop. Configured for 2WD applications, the system retains the stock exit location for a seamless factory fit. Please note this product carries a California Proposition 65 warning and is CARB compliant, making it a legal choice in emissions-regulated states.
