Tomioka Racing Subaru Single Scroll Unequal Length Exhaust Manifold with 3 bolts Up-pipe - 2002-2014 Subaru WRX / 2004-2021 STI

Tomioka Racing Subaru Single Scroll Unequal Length Exhaust Manifold with 3 bolts Up-pipe - 2002-2014 Subaru WRX / 2004-2021 STI

The Tomioka Racing Equal Length Exhaust Manifold with Up-Pipe is a stainless steel performance manifold for EJ Subaru WRX and STI -- improved exhaust scavenging, better turbo spool.

Equal Length Design for Balanced Pulse Separation

Equal length exhaust manifolds ensure each cylinder contributes equal exhaust energy to the turbocharger, eliminating the unequal pulse interference of the factory unequal length design. The balanced pulse separation improves turbine efficiency across the RPM range and contributes to faster spool. Constructed from stainless steel with TIG welding and lost wax finish for smooth internal surfaces.

Up-Pipe Included

Includes the up-pipe with a 3-bolt flange connection for air-tight sealing to the turbocharger inlet. Lost wax finish provides smooth inner surfaces that reduce turbulence in the exhaust stream. Compatible with stock and most aftermarket turbochargers at the factory location.

Fitment Notes

• Professional installation required
• Confirm turbocharger flange compatibility before ordering
• Fits 2004-2021 Subaru STI
• Fits 2002-2014 Subaru WRX

Straight From Subispeed

The equal length manifold is the correct upgrade when running a twin scroll turbocharger -- the matched pulse separation is needed to realize the twin scroll housing efficiency gain. Professional installation is required.

What's Included

• Tomioka Racing equal length exhaust manifold
• Up-pipe
• Turbo gaskets
• All installation hardware

About Tomioka Racing

Tomioka Racing has been engineering performance parts for Subaru platforms since 2007, with a catalog built around bolt-on reliability and real-world performance validation. Their turbocharger range covers everything from mild street upgrades to full competition kits, with each unit developed and tested specifically for the Subaru EJ and FA engine families. Rally Racing proven -- Tomioka Racing turbos have been run at the Pacific Forest Rally and other competition events, validating their performance under sustained high-load conditions.