GrimmSpeed Header / Up-Pipe Package – EJ25 Subaru Fitments

GRM.1307.5.BLK / GRM.1307.5.SS - GrimmSpeed Header / Up-Pipe Package – EJ25 Subaru Fitments

Unleash the Sound. Unlock the Flow.

The EJ platform has a lot to offer—but it’s held back by a restrictive, cast manifold and a bottlenecked stock up-pipe. Our Header / Up-Pipe Combo is built to fix that. By pairing our Unequal Length EJ Header with the GrimmSpeed 2-Bolt Up-Pipe, you’re opening up the flow path from the cylinder heads to the turbo with components designed for performance, durability, and that signature Subaru rumble.

What’s Included

• GrimmSpeed Unequal Length Header – Mandrel-bent, hand-welded, and equalized in performance without losing the classic boxer sound. Built from 304 stainless with thick flanges and smooth transitions for maximum flow and minimal turbulence.

• GrimmSpeed 2-Bolt Up-Pipe – Precision-built using our in-house FARO arm and SolidWorks modeling, this TIG-welded 14-gauge stainless pipe includes CNC-machined flanges and a flex joint designed to hold up under extreme temps and boost.

Made for EJ Power

This combo fits a wide range of EJ25-powered Subarus, including the WRX, STI, Forester XT, Legacy GT, and Outback XT. Whether you’re chasing spool, sound, or solid turbo efficiency, this setup delivers gains you’ll feel—and hear—right out of the box.

Package and Save

Grab both parts as a combo and save versus buying individually. That means more flow, more power potential, and more signature Subaru sound—all at a better price.

Options and Part Numbers

Circuit Spec R offers Free Shipping within the contiguous US. Confirm the vehicle application and selected options before ordering.