GrimmSpeed GRM113401 Equal Length Header for Subaru WRX 2022-2026 FA24

Vehicle Fitment

• 2022-2026 Subaru WRX (FA24T)
• 2019-2025 Subaru Ascent (FA24)
• 2020-2025 Subaru Outback XT (Onyx, Wilderness)
• 2020-2025 Subaru Legacy XT

Fitment Notes

• Replaces the OEM exhaust manifold on the FA24 twin-scroll turbo platform
• Compatible with the factory turbocharger or factory-like aftermarket turbochargers
• Designed to fit between the stock skid plate and oil pan without clearance issues

Features

• Provides the turbocharger with uninterrupted exhaust gas flow, improving spool response, horsepower, and torque while saving weight over the factory manifold
• CNC-bent, single-piece runners eliminate additional weld points that could introduce flow interruption or structural failure points
• True equal-length design with minimal variance in runner bend angle - critical for maximizing performance of the FA24's twin-scroll configuration
• Low-restriction 304 stainless steel cast collector allows for optimal runner spacing and equal bend lengths across all tubes
• Thick 1/2" CNC-cut and faced flanges (much thicker than OEM) ensure perfect flange flatness for superior gasket sealing
• 1.75" 14-gauge stainless steel tubing, welded on both the inside and outside of the flanges, for increased longevity
• Produces an aggressive, race-inspired exhaust tone throughout the entire RPM range
• Full 304 stainless steel construction throughout
• Includes all necessary gaskets and hardware for a complete installation

Specifications

• Type: Equal Length Exhaust Header (Manifold)
• Material: 304 Stainless Steel
• Tubing: 1.75", 14-Gauge
• Flange Thickness: 1/2" (CNC-Cut)
• Collector: Cast, Low-Restriction, 304 Stainless Steel
• Engine: FA24T Twin-Scroll

Included Components

• 1x GrimmSpeed Equal Length Header
• 1x Gasket Kit
• 1x Hardware Kit

Product Description

The GrimmSpeed GRM113401 equal length header replaces the restrictive factory manifold on the 2022+ WRX's FA24 twin-scroll turbo engine with CNC-bent, single-piece runners that eliminate the weld points and flow interruptions common in cheaper header designs. The result is a truly equal-length header with minimal variance in runner bend angle - a critical detail for getting the most out of the FA24's twin-scroll turbo configuration, delivering improved spool response, horsepower, and torque along with a genuine weight savings over stock.

Built entirely from 304 stainless steel with thick 1/2" CNC-cut flanges for superior gasket sealing and a low-restriction cast merge collector for smooth, consistent flow, this header is engineered to fit cleanly between the factory skid plate and oil pan without compromise. Beyond the performance gains, the equal-length layout produces an aggressive, race-inspired exhaust tone across the entire RPM range, making this a standout bolt-on upgrade for WRX, Ascent, Outback XT, and Legacy XT owners running the FA24 platform.