The Right Material for the Job
AISI 304L for durability. Inconel 625 LCF when steel isn't enough.
Not all exhaust systems face the same conditions. A naturally aspirated engine has different demands than a high-boost turbo. That's why we work with two families of alloys — choosing the right one for each application.
AISI 304L Stainless Steel
Austenitic stainless steel with 18% chromium, 8% nickel, and low carbon content. The "L" designation means lower carbon — better weldability and corrosion resistance in welded areas.
Specifications
- Excellent corrosion resistance — handles road salt, moisture, and exhaust condensation
- Stable mechanical properties across the operating temperature range
- Superior weldability with low risk of carbide precipitation
- Cost-effective without compromising quality
Inconel 625 LCF
A nickel-chromium-molybdenum superalloy originally developed for naval military applications. We use the LCF (Low Cycle Fatigue) variant — optimized for the thermal cycling that exhaust systems endure.
Specifications
- Maintains strength at temperatures where steel would fail
- Outstanding resistance to thermal fatigue from heat cycles
- Exceptional oxidation and corrosion resistance at extreme temperatures
- Originally developed for jet engines and naval propulsion systems
When do we use Inconel?
- High-boost turbo applications where exhaust temps exceed 900°C
- Racing and track-focused builds with sustained high-temperature operation
- Downpipes and manifolds directly exposed to turbine outlet temperatures
- When the customer demands the absolute best, regardless of cost
Comparison
| Property | AISI 304L | Inconel 625 |
|---|---|---|
| Max temp (continuous) | 870°C | 1000°C+ |
| Density | 8.0 g/cm³ | 8.44 g/cm³ |
| Thermal fatigue | Good | Exceptional |
| Cost | Standard | 4-5x higher |
| Best for | Most applications | Extreme turbo |
Every Material Serves a Purpose
We select the right alloy based on your engine, your driving style, and your goals. No upselling — just engineering.
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