Audi 3.0T Billet Thermostat Housing, EA837 Gen 1 Non-Evo

Vorsprung Autowerk Billet Aluminum Thermostat Upgrade (3.0T)

Plastic has no place in your cooling system.

From the factory, the Audi 3.0T is a masterpiece of engineering except for one glaring flaw. Audi equipped this high-heat, high-performance engine with a cheap plastic thermostat housing. It’s not a matter of if it fails, but when.

After thousands of heat cycles and constant exposure to corrosive antifreeze, that factory plastic turns brittle. It cracks. It warps. And eventually, it dumps your coolant, leading to overheating and potential catastrophic engine failure.

The Permanent Solution: We don't believe in replacing a failed plastic part with another plastic part. The Vorsprung Autowerk Billet Thermostat is the bulletproof fix your supercharged engine deserves. Precision-machined from 6061-T6 aluminum, this unit is engineered to outlast the car itself. It eliminates the weak link in your cooling loop, giving you the reliability you need for daily driving and the durability you need for the track.

Engineered, Not Just Machined. We didn’t just make it metal; we made it smarter.

Ready to Drop In: Stop worrying about your temp gauge. This unit comes pre-assembled with an OEM-equivalent thermostat.

Technical Specifications:

• Material: 6061-T6 Billet Aluminum (Zero warping, zero cracking).

• Finish: Anodized for superior corrosion resistance and engine bay aesthetics.

Kit Includes:

• Billet Housing
• Motorad (OE) Thermostat
• OE Gaskets
• All Hardware
• New Bolts

Billet Only Housing Includes:

• All of the above except the thermostat

Regulatory Notice: Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.

Thermostat Housing FAQ

Why does the factory plastic housing fail?
After thousands of heat cycles and constant exposure to corrosive antifreeze, the factory plastic turns brittle, cracks, and warps - eventually dumping coolant and risking overheating or catastrophic engine failure.

Should I get the full kit or the billet-only housing?
The full kit includes a Motorad (OE) thermostat, OE gaskets, all hardware, and new bolts. The billet-only housing includes everything except the thermostat.

Is this a direct bolt-on?
Yes, it comes pre-assembled and installs in place of the factory plastic housing with no modification required.

Will this fit my Audi?
This housing fits the Gen 1 (Non-Evo) 3.0T supercharged platform - check the Vehicle Fitment table above. If your Audi uses the later Gen 2 (CREC) 3.0T, you'll need a different housing.

Is this legal in California?
Not for sale or use in the state of California on any pollution-controlled vehicle, per the California Air Resources Board.

Drive the difference. Drive Vorsprung.