The PERRIN E4 Equal Length Headers is one of the latest and greatest creations that feature newly designed collectors to allow for smoother flow which means even more improved performance and structural rigidity. Because of the revision on the collectors, this header produces a balanced exhaust flow from the heads which means improved spool, and more horsepower and torque throughout the entire powerband. Additionally, you will enjoy the benefits of the weight savings compared to the OEM manifold, and it can work with most aftermarket up-pipe as well as the factory up-pipe.

This header has been built with 1.5” primary tubing that is expanded to the port matched flanges, and is perfect for those of you making up to 400WHP.

Please note that the 2.0L EJ20 engines will need the 2.5L STI oil pan install kit.