Description
Product Overview
The Thermal Zero HX35W Turbo Cover is a precision‑engineered component designed to replace the factory‑issued engine turbocharger cover for Holset HX35W units. Crafted from a proprietary high‑temperature alloy, the cover tolerates direct heat exposure exceeding 2500°F, ensuring structural integrity even under aggressive boost conditions. Its exterior finish is a sleek matte black that resists corrosion and blends seamlessly with most performance engine bays. Dimensions measure 5 x 8 x 7 inches and the unit weighs approximately 2 pounds, providing a lightweight yet robust solution. The cover features pre‑drilled stainless steel rivet holes that align perfectly with the OEM mounting points, allowing installation without the need to dismantle the turbo, downpipe, or wastegate. Each unit is handcrafted in the United States, reflecting Thermal Zero’s commitment to quality control and meticulous attention to detail.
Usage
This turbo cover is ideal for diesel and gasoline engines that employ the Holset HX35W turbocharger, commonly found in medium‑duty trucks, performance builds, and off‑road applications. It excels in environments where sustained high exhaust temperatures are expected, such as turbocharged diesel trucks used for towing, racing applications, or heavy‑duty industrial equipment. By shielding the wastegate assembly, the cover helps maintain consistent wastegate operation, reduces heat soak on surrounding components, and protects against debris ingress. Installation is straightforward: align the cover with the existing mounting tabs, insert the stainless steel rivets, and secure with a hand‑driven rivet gun. No special tools or turbo removal are required, minimizing downtime for fleet maintenance or race‑day prep.

Why Choose Us
Thermal Zero distinguishes itself through a blend of material science, American craftsmanship, and user‑centric design. The alloy used in the cover is tested in laboratory furnaces to verify performance well beyond typical OEM specifications, providing a safety margin that translates to longer service life. Hand‑assembly in a controlled U.S. facility ensures each rivet hole is perfectly aligned, eliminating the common fit‑issues seen with mass‑produced aftermarket parts. Additionally, the company offers a limited lifetime warranty against material defects, reflecting confidence in durability. Customers benefit from a product that not only meets the exact dimensions of the original part but also enhances heat resistance, corrosion protection, and overall engine reliability.
Key Features
- Exact OEM fit for Holset HX35W turbo and stock wastegate assembly
- Heat‑resistant alloy rated over 2500°F for extreme exhaust environments
- Easy, tool‑light installation using stainless steel rivet fasteners
- Handcrafted in the USA with rigorous quality inspections
- Matte black finish provides corrosion resistance and a professional look
FAQ
Will this cover fit a turbo that has been modified or upgraded?
The cover is dimensionally matched to the stock Holset HX35W turbo and its original wastegate housing. If the turbo case or wastegate has been altered, clearance may be affected. We recommend verifying the external dimensions before purchase.
Do I need any special tools to install the rivets?
No special tools are required beyond a standard hand‑driven rivet gun and the supplied stainless steel rivets. The installation process is designed to be completed in under 15 minutes by a technician familiar with basic engine work.
Can the cover be painted or coated for a different color?
While the cover comes in a durable black finish, it can be painted with high‑temperature engine paint if a different aesthetic is desired. However, any coating should be compatible with temperatures above 2000°F to avoid degradation.
Is there a warranty on this product?
Thermal Zero offers a limited lifetime warranty against material defects for the HX35W turbo cover. This warranty does not cover damage caused by improper installation or external impact.
How does this cover improve engine performance?
By protecting the wastegate and surrounding components from excessive heat, the cover helps maintain consistent wastegate actuation, which can lead to more stable boost pressure and reduced thermal stress on the turbo system. While it does not directly increase horsepower, it contributes to overall engine reliability and longevity.





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