-19%
Click to zoom in
SKU: S5520AL / UPC: 882963111074
MBRP Cat-Back Exhaust System for 2004-2006 Jeep Wrangler TJ Unlimited 4.0L I-6
Transform your 2004-2006 Jeep Wrangler TJ Unlimited with the MBRP S5520AL 2.5-inch cat-back exhaust system, engineered for drivers seeking noticeable gains in power, torque, and sound from their 4.0L inline-six engine. This single-side, turndown exit setup replaces the factory exhaust after the catalytic converter, delivering a deep, aggressive tone that echoes like a track-ready machine while channeling exhaust flow for real-world improvements in throttle response and pulling strength.
Built from 16-gauge heavy-duty aluminized steel, it resists corrosion and withstands road debris, ensuring lasting performance in dry conditions without the higher cost of premium materials.
Compared to stock systems or other aftermarket options, the S5520AL stands out by providing up to 18 horsepower and 28 ft/lbs of torque, plus 1-2 mpg better fuel economy, all while maintaining direct bolt-on compatibility that simplifies the upgrade process.
Drivers choose this system for its balance of aggressive exhaust note, measurable engine efficiency, and straightforward setup that gets you back on the trail faster.
Vehicle Fitment
- Years: 2004-2006
- Make: Jeep
- Model: Wrangler Unlimited (TJ), including Rubicon variants
- Engine: 4.0L I-6 (gasoline only)
Notes: Fits 2-door Unlimited models, direct replacement after catalytic converter, no modifications to engine or cab required.
What's Included in the Purchase
This complete cat-back kit arrives in one box with everything needed for installation:
- 2.5-inch mandrel-bent aluminized steel tubing (race profile design for smooth flow)
- Single straight-through muffler for reduced backpressure
- Turndown exit tailpipe (single rear exit configuration)
- 3.5-inch diameter tip (1 included)
- Factory-style hangers and brackets for direct fit
- Stainless steel clamps and hardware
- Installation instructions (no additional parts required)
Key Specifications
- Part Number: S5520AL
- UPC: 882963111074
- Material: 16-gauge aluminized steel
- Pipe Diameter: 2.5 inches
- Exit Style: Single rear, turndown
- Muffler Type: Straight-through (1 included)
- Tip Quantity: 1 (3.5-inch outlet)
- Cutting Required: Yes (minor adjustments possible for perfect alignment)
- Warranty: 3-year limited
- Country of Origin: North America-made for quality control.
Installation Details
Bolt this system on using basic hand tools in about 1-2 hours. It connects directly to factory hangers post-catalytic converter, with mandrel bends ensuring no restrictions in flow. Professional installation recommended if you're new to exhaust work, but the included hardware makes it accessible for weekend mechanics.
Shipping Information
- Part Weight: 28 lbs
- Shipping Box Dimensions: 42 in. L x 17 in. W x 8 in. H
Equip your Jeep Wrangler TJ Unlimited with the MBRP S5520AL today for a exhaust upgrade that amplifies every drive with added muscle and a signature rumble that turns heads on and off the road.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2006 | Jeep | Wrangler | Unlimited |
| 2005-2006 | Jeep | Wrangler | Unlimited Rubicon |
Catback
A catback exhaust system replaces everything from the catalytic converter back, covering the mid pipe, muffler, and tailpipe section in one bolt on upgrade. This collection covers catback systems for trucks, Jeeps, muscle cars, imports, and performance SUVs, giving you a straightforward way to improve sound, exhaust flow, and rear end styling without touching the factory catalytic converters or front pipe. Catback systems are available in stainless steel and titanium construction, with dual rear exit, single exit, and quad tip configurations, and a range of sound levels from mild touring tone to aggressive track character. Whether you want a deeper daily driver sound or a full track ready exhaust note, you will find a matched system for your platform here. What This Category Covers This collection includes complete catback exhaust systems, cat-back kits, dual rear exit systems, axle back adjacent catback upgrades, stainless steel and titanium exhaust systems, and street, tourin...
View Catback Products
Exhaust Systems
Performance exhaust systems for cars, trucks, SUVs, and Jeeps are stocked at Black Ops Auto Works. Shop cat-back systems, axle-back systems, turbo-back systems, headers, downpipes, mid-pipes, mufflers, resonators, catalytic converters, exhaust tips, exhaust valve controllers, oxygen sensors, exhaust brakes, and motorcycle and powersports exhausts for Mustang, Camaro, Challenger, Corvette, Silverado, and Super Duty platforms. Every product is filterable by exhaust position, material, pipe diameter, and vehicle year, make, model, and trim so the correct fitment ships the first time. Black Ops Auto Works carries 7,441 exhaust SKUs across every position of the exhaust system. What This Category Covers Exhaust upgrades change sound, appearance, and in some cases power. Exhaust fitment depends on engine, drivetrain, and factory exit position, so confirm the exact platform before ordering any exhaust component. Exhaust Position Cat-back, axle-back, turbo-back, and header-back systems e...
View Exhaust Systems Products
MBRP
MBRP exhaust systems for trucks, Jeeps, SUVs, and performance cars are stocked at Black Ops Auto Works. Shop MBRP cat-back systems, axle-back systems, filter-back diesel exhaust, exhaust brakes, downpipes, mid-pipes, mufflers, exhaust tips, and universal tubing and clamps for Ford F-150, Ford Ranger and Ranger Raptor, Jeep Wrangler, Jeep Grand Cherokee SRT, Dodge Challenger HEMI, RAM RHO, Toyota 4Runner and Land Cruiser, Chevy Tahoe, Cadillac Escalade, and Corvette platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 1,059 MBRP SKUs across cat-back, axle-back, filter-back, and diesel exhaust categories. What This Brand Covers MBRP built its reputation in the diesel truck market before expanding into gas trucks, Jeeps, muscle cars, and sports cars. The lineup spans Armor BLK and Armor Pro coated systems, T304 and T409 stainless steel cat-backs, aluminized steel value system...
View MBRP Products