Engine Mods

The IAG PTFE Engine Bay Fuel Kit for the 2008-21 Subaru STI combines our popular PTFE Fuel Line kit with our IAG Top Feed Fuel Rails and the Aeromo...

The IAG Performance PTFE Engine Bay Flex Fuel Kit for the 2008-21 Subaru STI combines our popular PTFE Flex Fuel Line kit with IAG Top Feed Fuel Ra...

The IAG Performance PTFE Engine Bay Flex Fuel Kit for the 2008-21 Subaru STI combines our popular PTFE Flex Fuel Line kit with IAG Top Feed Fuel Ra...

The IAG Performance Hand-Built 550 Subaru EJ25 Long Block Packages are a complete, valve cover to valve cover, crate engine. These engines offer si...

The IAG Performance Hand-Built Subaru EJ25 Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. These engines offer...

The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. These e...

The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. These e...

The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. These e...

The CNC Billet Aluminum EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness ...

The Process West range billet manifolds is a no holds barred manifestation of what is possible under the hood of a WRX/STI when perfect aesthetics ...

The Process West range billet manifolds is a no holds barred manifestation of what is possible under the hood of a WRX/STI when perfect aesthetics ...

Stay Ahead Of Your Competition With The AMS Subaru WRX / STI Intake Manifold! The AMS Subaru Intake Manifold was designed to outperform the competi...

Weight - 2.0lbs Material - Full T304 Stainless Steel Manufacture - Tig-welded and fabricated by hand Style - Brushed finished

This helps to isolate the intake from the hot engine bay temps and provide the coldest and most direct intake charge.  Features Utilizes the fact...

AEM’s X-Series Inline Wideband UEGO Air/Fuel Ratio Controllers are built upon unique, patented, 100% digital technology that makes them the fastest...

When a car equipped with a McPherson Strut suspension system, like the 2015 Subaru WRX 2.0L or WRX STi 2.5L, is being driven through a turn there i...

AEM Cold Air Intake Systems are designed to produce horsepower and torque gains. They replace the restrictive factory airbox and air filter to give...

The TurboXS 2015+ Subaru WRX Front Mount Intercooler Kit might be the single best modification you can do to your 2015-2016 WRX.  One of the bigges...

The TurboXS 2015+ Subaru WRX Front Mount Intercooler Kit might be the single best modification you can do to your 2015-2016 WRX.  One of the bigges...

DESCRIPTION The FactionFab MLS Head to Exhaust Manifold Gasket for EJ Models is a quality and durable gasket that will provide your vehicle with a ...

DESCRIPTION The FactionFab MLS Turbo to Downpipe Gasket for Subaru EJ Models is a quality and durable gasket that will provide your vehicle with a ...

DESCRIPTION With the removal and re-installation of intakes, and due to external weather and under hood temperatures, the factory O ring on the MAF...

DESCRIPTION With the removal and re-installation of intakes, and due to external weather and under hood temperatures, the factory O ring on the MAF...

DESCRIPTION Obtain the factory OE gasket at a fraction of the cost compared to dealership prices with this FactionFab OE Line Subaru EJ Head to Exh...

DESCRIPTION Obtain the factory OE gasket at a fraction of the cost compared to dealership prices with this FactionFab OE Line Subaru EJ Up-Pipe to ...

DESCRIPTION Obtain the factory OE gasket at a fraction of the cost compared to dealership prices with this FactionFab OE Line Subaru EJ Turbo to Do...

DESCRIPTION Here, you are looking at the Faction Fab Subaru EJ Series Motor Turbo Blanket. Turbochargers work on the basis of heat energy and keepi...