The Subaru WRX STI Engine Exhaust Valve by Manley Performance, Extreme Duty, is a top-tier component specifically crafted for 2004 models. Designed for enthusiasts who demand superior performance, this valve is ideal for advanced applications that require utmost durability and precision.

Built to withstand the rigorous conditions commonly associated with high-performance engines, the Manley Performance Extreme Duty valve is engineered using the industry-renowned XH-432 XtremeAlloy. This material choice ensures exceptional heat and force resistance, making it suitable for extreme environments found in Top Fuel, Funny Car, and Marine Engine applications. The valve features chrome stems and hard tips for unparalleled longevity and resistance to wear. It is also swirl polished in under-head areas and has fully machined combustion faces to optimize airflow and combustion efficiency, thereby enhancing overall engine performance.

Features

• Tailored for extreme heat and force applications
• Made with XH-432 XtremeAlloy for superior resistance
• Chrome stems and hard tips for exceptional durability
• Swirl polished under head areas for improved airflow
• Fully machined combustion faces for enhanced combustion efficiency

If you’re considering improving your Subaru STI’s engine capabilities with enduring components like these, don't hesitate to contact us with any inquiries. We provide expert installation and customization services at our locations in Austin, Texas, and the Los Angeles, California area. Feel free to give us a call at 512-982-9393 (TX) or 562-981-6800 (CA). For those considering multiple purchases, please reach out to discuss shipping discounts. We're also equipped to perform installations on premises at either of our locations.

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