Turbo Manifold Nissan CA18 High Mount
Nissan CA18 Turbo Manifold
Designed for serious street and motorsport applications, the Walton Motorsport Nissan CA18 Turbo Manifold combines proven durability with efficient exhaust gas flow to support reliable power at every boost level.
Every manifold is manufactured using carefully selected premium-grade 304 stainless steel and our proven construction methods, developed to withstand the extreme temperatures and repeated heat cycles experienced by high-performance turbocharged engines.
At the heart of the design is our proprietary cast merge collector and a carefully developed wastegate runner that delivers excellent boost control while maintaining efficient turbine flow.
Nissan CA18 Turbo Manifold Features
- Premium specification 304 stainless steel construction
- Precision TIG welded and fully back-purged throughout
- In-house designed cast merge collector for maximum strength, durability and gas flow
- Port-matched head flange with fully blended runner transitions
- Curved wastegate runner developed alongside leading engine tuners to maximise wastegate priority and minimise boost creep
- Optimised for Turbosmart external wastegates from 40 mm to 50 mm
- Designed for outstanding thermal durability under sustained high-performance us
- Backed by the Walton Motorsport Lifetime Warranty
Whether you're building a responsive street car or a dedicated competition vehicle, the Walton Motorsport CA18 Turbo Manifold is engineered to deliver reliable performance, excellent boost control and the confidence to keep pushing harder.
Further Questions?
Turbo Manifold Nissan CA18 High Mount - GV28 / 40 - 50mm Port Size (NO flange fitted) is backordered and will ship as soon as it is back in stock.
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Turbo Manifold Nissan CA18 High Mount
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Suits Engine
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Suits ChassisNissan S13, Nissan S14, Nissan S15
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Built to Last. Backed for Life.
A lifetime warranty is easy to offer. Building a turbo manifold that's unlikely to ever need it is the hard part.
Every Walton Motorsport manifold is engineered to withstand the extreme temperatures, vibration and abuse that come with high-performance street and race applications. From material selection and fabrication to our cast collectors and proven designs, durability is built into every product.
The biggest inconvenience of a failed manifold isn't the repair—it's the downtime, the labour to remove it, and the event or track day you might miss. That's why our focus has always been on preventing failures before they happen, not simply replacing parts after they do.
We're proud to stand behind every manifold we manufacture with a Lifetime Warranty. While no mechanical component is indestructible, our goal has always been simple: build products that earn your trust by performing reliably for years to come.
Because when you choose Walton Motorsport, the last thing you should be worrying about is your manifold.
Material Selection
Every Walton Motorsport manifold starts with carefully selected 304 stainless steel tubing. Not all 304 stainless is manufactured to the same standard, and the quality of the tubing plays a critical role in the durability of the finished product.
Turbo manifolds are subjected to thousands of extreme heat cycles throughout their life. Lower-quality tubing can fatigue over time, and we've seen inferior materials crack or split along the welded seam under these conditions. That's why we specify the exact tube grade and wall characteristics we know will perform reliably in demanding street and motorsport applications.
Our cylinder head flanges are designed in-house and precision cut using modern fibre laser technology, providing exceptional dimensional accuracy and repeatability. Compared to traditional CO₂ laser cutting, fibre laser cutting delivers cleaner edges and tighter tolerances, ensuring an accurate fit and consistent sealing.
Manufacturing Process
Port-Matched Flange Construction
Rather than simply welding the runners to the face of the flange, Walton Motorsport machines each runner to pass through the flange before it is TIG welded from both sides. The ports are then hand-finished to produce a smooth, uninterrupted transition from the cylinder head into the runner.
This manufacturing method delivers several important advantages:
- Increased weld strength and long-term durability.
- Improved gas flow by eliminating abrupt transitions.
- A smoother change from the oval exhaust port to the round runner.
- Reduced turbulence for improved exhaust efficiency.
The result is a manifold that is stronger, flows better, and is built to withstand years of hard use.
Cast Merge Collector
At the heart of every Walton Motorsport manifold is our proprietary cast merge collector, designed entirely in-house.
Our latest collector design delivers the highest wastegate flow we've achieved while maintaining excellent merge efficiency into the turbine. The internal geometry provides smooth gas transitions, minimising turbulence and helping to reduce exhaust gas temperatures without sacrificing performance.
Unlike fabricated collectors assembled from multiple sections, our one-piece cast design eliminates internal joints and welds within the collector itself. This not only optimises gas flow but also significantly improves structural integrity, reducing the likelihood of collector failures that can damage turbochargers or engines.
Every design decision is made with the same objective: maximum performance, exceptional durability, and complete confidence when pushing your engine to its limits.
For a deeper look at our engineering philosophy and manufacturing methods, visit our Technical Centre.
Proven Motorsport Experience
In every Walton Manifold
