Compatible with Subaru WRX STI Equal Length Header Prosport

Be sure to check out the dyno results sheet. Our header & up-pipe added 13 ft/lbs Torque and 11 Horsepower to the wheels!! Our headers are a work of art, you might be tempted to just hang them on the wall and stare at them all day! They are fully constructed out of T304 stainless steel, including the flanges! This set INCLUDES uppipe which uses our exclusive 3 bolt flange design between the manifold and uppipe providing a stable connection without air leaks. With a jaw dropping 45mm inner pipe diameter you can be sure your spent exhaust will exit in a hurry. You have to see this header in person to appreciate it, the welds are just incredible! This Subaru exhaust header includes 5 up pipe-to turbo studs, and one up pipe-to-header nut and bolt. (You'll re-use the other two bolts from your factory manifold.)

• ENGINEERED FOR PRACTICAL AUTOMOTIVE USE Designed to support common vehicle applications with a focus on compatibility and straightforward installation.
• CLEAN, PROFESSIONAL INSTALLATION EXPERIENCE Made to integrate into typical build workflows while keeping results neat and consistent.
• DESIGNED WITH DURABILITY IN MIND Materials selected to align with automotive temperature changes and vibration commonly encountered in daily use.
• VERSATILE FOR DIY AND SHOP PROJECTS Useful across a range of maintenance, repair, and upgrade tasks where dependable performance is preferred.
• PROSPORT PERFORMANCE BRAND VALUE Backed by a brand known for enthusiast-focused products and clear, compliant marketplace presentation.