Korsh Twin Scroll Header & Up-Pipe – Subaru WRX 94–14 / STI 02–21 / Liberty GT 05–09 / Forester XT 04–08

The Korsh Twin Scroll Header and Up-Pipe system is designed for Subaru enthusiasts running twin scroll turbochargers who want to maximise exhaust flow and performance. Manufactured from high-quality 304 stainless steel with cast stainless flanges, this setup delivers durability, reliability, and consistent performance under extreme heat cycling.

The twin scroll design features a 45 mm primary pipe diameter to optimise exhaust gas velocity and improve flow across the entire RPM range. The twin scroll configuration separates exhaust pulses to reduce interference and improve turbo response. A free-flowing layout helps unlock noticeable gains in throttle response and mid-to-top end power, while a built-in slip-joint expansion section allows for thermal movement, reducing stress and improving long-term reliability. All welds are fully TIG welded for maximum strength and precision.

The included 60 mm 3-bolt twin scroll up-pipe uses a cast stainless flange and multi-layer steel gasket to ensure a secure, leak-free connection between the header and turbocharger. The kit also includes all required hardware and premium gaskets, including copper exhaust nuts proven to maintain clamping force even under repeated heat cycles.

Key Features

• Twin scroll design for optimised turbo response and reduced lag
• 304 stainless steel construction with cast stainless flanges
• 45 mm primary piping for improved exhaust flow and performance
• Twin scroll configuration reduces exhaust pulse interference
• Slip-joint expansion section to accommodate heat cycling
• Fully TIG welded for strength and durability
• 60 mm 3-bolt twin scroll stainless steel up-pipe included
• Includes titanium heat wrap for improved thermal management

What's Included

• Twin scroll stainless steel exhaust header
• 3-bolt twin scroll stainless steel up-pipe
• 3-bolt up-pipe gasket
• Up-pipe to manifold zinc-plated bolts and nuts (x3)
• Up-pipe to turbo threaded studs (x5)
• EGT plug
• Copper flange nuts – manifold to head (x6)
• Manifold to cylinder head gaskets (x2)
• Up-pipe to turbo gasket

This system is ideal for street and performance builds running twin scroll turbochargers looking to improve exhaust efficiency and reduce turbo lag.