GrimmSpeed Equal Length Header - 2022-2025 Subaru WRX

GrimmSpeed Equal Length Header - 2022-2025 Subaru WRX

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Features:

• Full 304 stainless steel build (flanges, tubing, collector, badge)

• CNC-bent equal-length runners with under 1% variance

• Cast merge collector for smooth, consistent flow

• Mandrel-bent tubing with no internal steps

• ½" CNC flanges and 14ga tubing for durability

• Direct bolt-on with no tuning needed

• Clears factory skid plate—no spacers required

• Includes all gaskets and install hardware

 

Precision Engineering for Superior Performance
GrimmSpeed’s extensive exhaust expertise and meticulous attention to detail have culminated in a premium upgrade to the factory exhaust manifold. By identifying and addressing the limitations of the OEM design, we developed a high-performance alternative: the GrimmSpeed Equal Length Header for the 2022+ Subaru WRX. Engineered to exceed expectations, this header delivers exceptional durability, performance, and craftsmanship.

 

True Equal-Length Design with Seamless Flow
Each header runner is CNC-bent and precision-trimmed from a single piece of tubing, eliminating unnecessary welds that can compromise flow and structural integrity. The result is a truly equal-length configuration with minimal variation in bend angles—crucial for extracting maximum performance from the FA24’s twin-scroll setup. This design enhances exhaust scavenging and ensures optimal flow dynamics across all cylinders.

 

Durable Construction with Advanced Cast Collector
A key innovation lies in the use of a low-restriction, 304 stainless steel cast collector. This component enables ideal runner spacing and angles, allowing the entire header to fit snugly between the OEM skid plate and oil pan while maintaining high performance. Unlike welded collectors, which can suffer from turbulence or long-term cracking, the cast design offers smoother flow transitions and superior structural integrity—setting the GrimmSpeed header apart from other aftermarket solutions.

Heavy-Duty Flanges for Superior Sealing
The GrimmSpeed Equal Length Header features CNC-cut and surface-faced flanges crafted from ½-inch thick 304 stainless steel—substantially thicker than the OEM counterpart. This added thickness ensures perfectly flat flanges, which results in more effective gasket sealing, enhanced exhaust flow, and improved long-term reliability. It’s a design choice that underscores both performance and durability.

 

High-Quality Runners for Longevity and Flow
The header runners are constructed from robust 1.75" 14-gauge stainless steel tubing, designed to withstand the rigors of high-performance driving. Each runner is meticulously welded on both the inner and outer edges of the flange—an extra manufacturing step that creates a smooth transition lip. This design not only strengthens the welds but also reduces turbulence, helping exhaust gases flow more efficiently through the system.

 

Complete Kit for a Seamless Installation
GrimmSpeed includes everything needed for a hassle-free install on your 2022+ WRX, including high-quality gaskets and hardware. With precision construction, premium materials, and thoughtful engineering, this header isn’t just visually striking—it leads the pack in performance, longevity, and installation simplicity.

 

 

FITMENTS:

• 2022+ Subaru WRX (All trims)
• 2019+ Subaru Ascent (All trims)
• 2019+ Subaru Outback (Wilderness, XT, and Onyx Trims equipped with FA24DIT)
• 2020+ Subaru Legacy (Sport and XT Models equipped with FA24DIT)

INSTALLATION:

GrimmSpeed 2022-2025 WRX Equal Length Header Installation Guide (PDF)