Nissan Navara Exhaust Manifold Upgrades – D40 & D22 2.5L
If you’re running a Nissan Navara, you already know how important reliability and torque are for day-to-day driving. Whether it’s towing, touring, or just making sure your ute runs smooth, the exhaust manifold is one of those parts that makes a huge difference. Factory manifolds can crack or restrict flow over time, which is why upgrading to a high-quality replacement is a smart move.
At Drivecore Automotive, we’ve got two solid upgrade options: the Nissan Navara D40 2.5L Exhaust Manifold and the Nissan Navara D22 2.5L Exhaust Manifold. Both are designed as direct replacements with added performance benefits.
Nissan Navara D40 2.5L Exhaust Manifold Upgrade
This D40 factory replacement manifold is all about flow and spool. Built from 32NB primary runners and a 40NB turbo runner, it increases exhaust gas velocity for sharper turbo response. The result? Better spool, more torque down low, and a more reliable daily drive.
Key Features:
- Constructed from 32NB primary runners & 40NB turbo runner
- 12mm stainless steel header and turbo plates for durability
- Supplied with a 6mm EGR block-off plate
- Designed to maximise flow while keeping your stock setup reliable
Fitment Note:
Before purchasing, call Nissan with your license plate and confirm if your factory manifold carries part number 14004-EB70A. If it matches, this manifold is the right fit. Some aftermarket dump pipes may touch the chassis during install – a slight adjustment might be required.
Nissan Navara D22 2.5L Exhaust Manifold Upgrade
The D22 version follows the same winning recipe – stronger, smoother, and designed to get the most out of your 2.5L turbo diesel.
Key Features:
- Direct factory replacement turbo manifold
- 32NB primary runners with 40NB turbo runner for increased flow
- 12mm stainless steel header and turbo plates
- 6mm EGR block-off plate included
Important Note:
Gaskets and bolts are not included and will need to be purchased separately.
Why Upgrade Your Navara Exhaust Manifold?
Over time, factory manifolds are prone to cracking and restricting turbo performance. By upgrading to a high-quality stainless steel replacement, you’re not only restoring reliability but also gaining:
- Improved turbo spool – quicker response means easier driving in all conditions.
- Stronger low-end torque – great for towing, climbing, or just making the ute feel more alive.
- Long-term durability – thicker stainless steel plates and runners resist warping and cracking.
Final Thoughts
Whether you own a D40 or D22 Nissan Navara 2.5L, upgrading the exhaust manifold is one of the best reliability mods you can make. It’s a straightforward replacement that offers better flow, torque, and spool while keeping your ute tough and dependable.
👉 Check out our full range of Navara upgrades at Drivecore Automotive – because when it comes to keeping your rig reliable, the right parts make all the difference.