Stainless Steel Manifold Headers for Nissan Titan Armada & Infiniti QX56 (2004-2015) 5.6L Engine Extension Pipe

Stop ignoring that ticking sound from your wheel well and finally give your VK56DE the breathing room it deserves.

Performance Stainless Steel Manifold Headers for Nissan & Infiniti 5.6L V8 (VK56)

If you own a first-gen Titan or Armada, you’re likely familiar with the "ticking" of cracked factory manifolds. The OEM cast iron units are notorious for heat-cycling to the point of failure, often leading to exhaust leaks that sap your low-end torque and trigger annoying check engine lights. These stainless steel headers don't just fix a design flaw; they transform the VK56DE from a restricted workhorse into a high-flow powerhouse.

The 5.6L V8 platform is a torque monster, but the factory manifold's cramped runners create massive backpressure. By moving to a 6-2 piping design with a 3" outlet, we’re optimizing exhaust scavenging. This means the engine doesn't have to work as hard to push out spent gases, allowing the cylinders to fill more completely with fresh air on the next stroke. It’s the single most effective way to wake up the throttle response on these heavy-duty platforms.

Whether you are towing a flatbed or hitting the trails, these headers provide a broad power increase across the entire RPM range. The T304-style stainless construction is a massive upgrade over the brittle stock pieces, ensuring that once you do this job, you won't have to worry about manifold cracks again. Plus, the 4 integrated O2 sensor bungs mean you can maintain proper fuel trims and emissions compliance without custom fabrication.

Why You Need This Upgrade

• Eliminate OEM Failure: Replaces the prone-to-cracking factory cast manifolds with durable, heat-resistant stainless steel.
• Enhanced Towing Power: Gain an estimated 10–15 HP and TQ, providing much-needed grunt when pulling heavy loads.
• Superior Scavenging: The 6-2 design improves exhaust flow velocity, sharpening throttle response and engine efficiency.
• Aggressive Sound Profile: Swapping the restrictive stock units for these headers results in a deeper, more refined V8 growl.

Installation Notes

This is a direct-fit replacement for the factory manifolds; however, given the tight engine bay tolerances of the Titan and Armada, professional installation is highly recommended. You will need to reuse your factory hardware or source high-grade studs. No permanent modifications to the vehicle are required, but ensure you have fresh gaskets on hand to guarantee a leak-free seal.

Replaces These OEM Applications & Part Numbers

• 2004–2015 Nissan Titan (5.6L V8 Engine)
• 2005–2015 Nissan Armada (5.6L V8 Engine)
• 2004–2013 Infiniti QX56 (5.6L V8 Engine)

14002-7S000, 14002-7S00A, 14002-ZH30A, 14002-ZQ00A, 14002-7S011, 14002-7S01A, 14002-ZH31A, 14002-ZQ01A

Ditch the restrictive factory bottlenecks and let your V8 breathe—get the durability and sound your truck deserves today.