aFe Twisted Steel SS-409 Stainless Steel Header
2007–2018 Jeep Wrangler, 2005–2010 Jeep Grand Cherokee
48-46203
Overview:
The aFe Twisted Steel SS-409 Stainless Steel Header is a high-performance short tube header designed specifically for select Jeep Wrangler and Grand Cherokee models from 2005 to 2018. Engineered for racing enthusiasts and off-road adventurers seeking enhanced power and torque, this header replaces restrictive factory exhaust manifolds to unlock improved engine breathing and efficiency. Delivering a noticeable gain in horsepower and torque, it is ideal for drivers looking to maximize their Jeep’s performance without compromising reliability.
Constructed with precision and durability in mind, this header is a direct bolt-on upgrade that fits factory mounting locations, ensuring a hassle-free installation with no modifications required. It is perfect for those who demand both performance and longevity from their exhaust components.
Key Features:
Designed to optimize exhaust flow and improve engine output, the aFe Twisted Steel Header incorporates advanced engineering and quality materials. Key features include:
- Constructed from 1-1/2" diameter, 14-gauge SS-409 stainless steel tubing for strength and corrosion resistance
- True mitered merge collectors that eliminate dead space and reduce turbulence for superior exhaust flow
- Optimized tube lengths utilizing pulse control technology to enhance scavenging and overall performance
- 3/8" thick flanges to ensure a leak-free, durable seal against the cylinder head
- Includes six spark plug wire protective boots to safeguard ignition components
- Supplied with all necessary gaskets for a complete installation
- Direct bolt-on fitment with factory mounting locations—no cutting, welding, or modifications needed
- Designed specifically for Jeep Wrangler (JK) and Grand Cherokee V6 3.8L engines within the specified years
- Backed by a 2-year limited warranty for peace of mind
Construction & Design:
The aFe Twisted Steel Header is expertly crafted from premium SS-409 stainless steel, known for its excellent resistance to rust and heat. The 14-gauge tubing thickness balances durability with weight savings, while the 1-1/2" diameter tubing enhances exhaust gas velocity and flow. The use of true mitered merge collectors is a standout design feature that minimizes turbulence and dead space commonly found in formed collectors, resulting in smoother exhaust pulses and improved engine efficiency.
Additionally, the thick 3/8" flanges provide a robust sealing surface that prevents leaks and withstands the rigors of off-road and high-performance driving. The header’s smooth bends and increased diameter work together to reduce backpressure, promoting better throttle response and engine longevity.
Performance & Sound
By replacing the restrictive factory manifolds, the aFe Twisted Steel Header delivers measurable performance gains, including an increase of approximately 6 horsepower and 6 lb-ft of torque. This improvement enhances acceleration and overall engine responsiveness, making it an excellent upgrade for spirited driving and off-road use.
The design also contributes to a more aggressive exhaust note, providing a deeper and more refined sound that complements the Jeep’s rugged character without excessive drone.
Installation & Fitment:
Installation is straightforward thanks to the header’s direct bolt-on design that aligns with factory mounting points. No cutting, welding, or other modifications are necessary, allowing for a clean and professional fit. The package includes all required gaskets and spark plug wire boots, ensuring a complete and hassle-free upgrade.
This header fits the following vehicles:
- 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)
- Jeep Grand Cherokee (2005–2010)
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 ideal for Jeep owners who want to enhance their vehicle’s power and torque without extensive modifications. It suits off-road enthusiasts, racers, and daily drivers who demand improved throttle response, better exhaust flow, and a more aggressive exhaust tone. It is especially beneficial for those running the V6 3.8L engine in Jeep Wrangler and Grand Cherokee models within the specified years.
