Subaru STI Performance Exhaust - GrimmSpeed - 2-Bolt Up-Pipe - ’04–’21. Purpose-built for EJ25-powered STI models, this up-pipe is a straightforward upgrade for enthusiasts seeking sharper response and dependable performance.

Replacing the factory unit with a precision-fit 2-bolt design helps reduce restriction between the exhaust manifold and turbocharger, promoting quicker spool and more consistent boost. Engineered by GrimmSpeed for proper fitment on 2004–2021 STI applications, it’s a smart choice for refreshing high-mileage hardware or laying the groundwork for future supporting mods while keeping drivability in focus.

Features

• Application-specific 2-bolt fitment for 2004–2021 Subaru STI EJ25
• Reduced restriction between manifold and turbo to aid response
• Quality construction suited for heat and vibration demands
• Designed by GrimmSpeed for proper alignment and sealing
• Suitable for street or track-focused builds

Have questions or need guidance for your setup? Call our team—installation and customization services are available at our Austin, Texas and Los Angeles, California area locations: 512-982-9393 (TX) and 562-981-6800 (CA).

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov