Perrin Equal Length Header 2022-2025 WRX / 2020-2025 Outback / 2020-2025 Legacy 2019-2025 Ascent | +5-10 WHP Stage 1 | Performance Exhaust Header
Overview
The Perrin Equal Length Header is a high-performance exhaust component designed specifically for the 2022-2025 Subaru WRX, 2020-2025 Outback, 2020-2025 Legacy, and 2019-2025 Ascent models. This header replaces the restrictive factory manifold with larger diameter primary and secondary tubes that equalize exhaust pulse timing, improving flow efficiency and increasing horsepower and torque. It is ideal for Subaru enthusiasts looking to extract more power from their turbocharged engines without compromising turbo response or drivability.
Engineered with precision, Perrin’s header features high-quality expansion joints lined with thermal insulation to withstand extreme heat and maintain durability. The design carefully preserves the OEM heat shield fitment, which is critical for managing under-hood temperatures and protecting vital engine components. The primaries and secondaries are approximately 14% larger than stock, promoting smooth and balanced exhaust flow that enhances power delivery across the RPM range.
In real-world testing on a Stage 1 tuned 2022 WRX with typical bolt-ons, the Perrin Equal Length Header delivers a measurable 5-10 wheel horsepower gain at higher RPMs, with even greater improvements on cars exceeding 350 WHP. This upgrade provides Subaru owners a reliable and effective way to unlock additional performance while maintaining OEM-level fitment and thermal management.
Features & Specifications
This Perrin Performance Equal Length Header is engineered for 2022-2025 WRX, 2020-2025 Outback, 2020-2025 Legacy, and 2019-2025 Ascent models and features 14% larger primary and secondary tubes than stock. Constructed from brushed stainless steel, it delivers improved exhaust flow and power gains for Subaru enthusiasts seeking enhanced turbo response and horsepower.
-
Brand: Perrin Performance
-
Product: Equal Length Header 2022-2025 WRX / 2020-2025 Outback / 2020-2025 Legacy 2019-2025 Ascent
-
Part Number: PSP-EXT-058
-
Fitment: 2022-2025 Subaru WRX, 2020-2025 Subaru Outback, 2020-2025 Subaru Legacy, 2019-2025 Subaru Ascent
-
Material: Brushed Stainless Steel
-
Finish: Brushed Stainless Steel
-
Construction: Welded with high-quality expansion joints and thermal liners
-
Origin: Made in USA
-
Power Gains: +5-10 WHP on Stage 1 tuned cars
-
Tuning Required: No tuning required
Key Benefits
-
Performance: Increases horsepower and torque without sacrificing turbo spool or drivability
-
Durability: High-quality expansion joints with thermal liners resist heat damage and extend header life
-
Fitment: Designed to fit perfectly under the OEM heat shield, preserving factory thermal management
-
Quality: Constructed from premium brushed stainless steel for corrosion resistance and long-term reliability
-
Power Delivery: Larger primaries and secondaries promote smooth, balanced exhaust flow for consistent power gains
-
Value: Provides significant performance improvements without the need for additional tuning or supporting modifications
What's Included
- 1× Perrin Equal Length Header for 2022-2025 WRX / 2020-2025 Outback / 2020-2025 Legacy / 2019-2025 Ascent
- High-quality expansion joints with thermal liners installed
- Installation instructions
Installation & Compatibility
Installation of the Perrin Equal Length Header is moderately complex and generally recommended for experienced DIYers or professional installers due to the need to access the turbo manifold area and handle exhaust components. No tuning is required after installation, making it a straightforward upgrade for Stage 1 and higher builds. The header is designed to retain the OEM heat shield, which helps maintain proper oil temperatures and engine bay thermal management. Verify fitment carefully for your specific Subaru model and year to ensure compatibility.
-
Professional Installation: Recommended
-
Modifications Required: None
-
Verify Compatibility: Confirm fitment for your specific year and trim level
Shop with confidence at Subimods—your Subaru parts specialists.
