aFe Twisted Steel SS-409 Stainless Steel Header

2007–2011 Jeep Wrangler 3.8L V6

Part #: 48-46203

Overview

The aFe Twisted Steel SS-409 Stainless Steel Header is a premium short tube header engineered to replace the restrictive factory exhaust manifolds on select Jeep Wrangler and Grand Cherokee models equipped with the 3.8L V6 engine. Designed for enthusiasts who demand enhanced power, torque, and throttle response, this header unlocks improved engine breathing and efficiency, delivering noticeable performance gains without sacrificing reliability.

Ideal for off-road adventurers, racers, and daily drivers alike, this direct bolt-on upgrade offers a hassle-free installation and long-lasting durability. It is specifically tailored to fit Jeep Wrangler models from 2007 to 2011, providing a perfect balance of performance enhancement and rugged dependability.

Key Features

Engineered with advanced design and quality materials, the aFe Twisted Steel Header offers several key benefits that optimize exhaust flow and engine output:

• Constructed from 1-1/2" diameter, 14-gauge SS-409 stainless steel tubing for superior strength and corrosion resistance
• True mitered merge collectors that eliminate dead space and reduce turbulence for smoother exhaust pulses
• Optimized tube lengths utilizing pulse control technology to enhance scavenging and overall engine performance
• 3/8" thick flanges ensuring a leak-free, durable seal against the cylinder head
• Includes six spark plug wire protective boots to safeguard ignition components during installation and use
• Supplied with all necessary gaskets and hardware for a complete, direct bolt-on installation
• Designed specifically for Jeep Wrangler 3.8L V6 engines from 2007 to 2011
• Backed by a 2-year limited warranty for added peace of mind

Construction & Design

The header is expertly crafted from premium SS-409 stainless steel, known for its excellent resistance to rust and heat, making it ideal for the demanding conditions of off-road and high-performance driving. The 14-gauge tubing thickness strikes a balance between durability and weight savings, while the 1-1/2" diameter tubing enhances exhaust gas velocity and flow for improved engine efficiency.

True mitered merge collectors are a standout feature, minimizing turbulence and dead space commonly found in formed collectors. This design promotes smoother exhaust pulses and better scavenging, which translates into increased horsepower and torque. The thick 3/8" flanges provide a robust sealing surface that prevents leaks and withstands the rigors of extended use.

Performance & Sound

By replacing the factory manifolds, the aFe Twisted Steel Header delivers measurable performance improvements, including an approximate gain of 6 horsepower and 6 lb-ft of torque. These gains enhance acceleration, throttle response, and overall engine responsiveness, making it an excellent upgrade for spirited driving and off-road excursions.

Additionally, the header contributes to a deeper, more aggressive exhaust note that complements the Jeep’s rugged character without introducing excessive drone, providing a refined yet powerful sound experience.

Installation & Fitment

Installation is straightforward thanks to the header’s direct bolt-on design, which aligns perfectly with factory mounting points. No cutting, welding, or modifications are required, allowing for a clean and professional fitment. The package includes all necessary gaskets and spark plug wire boots, ensuring a complete and hassle-free upgrade.

This header fits the following Jeep Wrangler models equipped with the 3.8L V6 engine:

• Jeep Wrangler 70th Anniversary (2011)
• Jeep Wrangler Rubicon (2007–2011)
• Jeep Wrangler Sahara (2007–2011)
• Jeep Wrangler Sport (2010–2011)
• Jeep Wrangler Unlimited 70th Anniversary (2011)
• Jeep Wrangler Unlimited Rubicon (2007–2011)
• Jeep Wrangler Unlimited Sahara (2007–2011)
• Jeep Wrangler Unlimited Sport (2010–2011)
• Jeep Wrangler Unlimited X (2007–2010)
• Jeep Wrangler X (2007–2010)

What's Included

• One Twisted Steel SS-409 Stainless Steel Short Tube Header
• Set of gaskets for installation
• Six spark plug wire protective boots
• All necessary hardware for direct bolt-on installation

Ideal For

This header is perfect for Jeep owners who want to maximize their 3.8L V6 engine’s power and torque without extensive modifications. It suits off-road enthusiasts seeking improved throttle response and durability, racers looking for enhanced performance, and daily drivers who desire a more aggressive exhaust tone and better overall engine efficiency. The aFe Twisted Steel Header is a reliable upgrade that balances performance gains with long-term dependability.

aFe POWER (Advanced FLOW Engineering) offers dyno-proven intake, filtration, and exhaust upgrades aimed at measurable performance gains. The brand’s lineup is geared toward enthusiasts looking for better airflow, improved sound, and durable materials—from cold air intakes to stainless exhaust systems for street and track applications.