Markdown Grimmspeed HiFlow Exhaust Manifold Crosspipe Raw 2006-2007 WRX / 2004-2008 Forester XT

Description

Grimmspeed HiFlow Exhaust Manifold Crosspipe Raw 2006-2007 WRX / 2004-2008 Forester XT | Turbo Response Enhancement | Exhaust Component

Overview

The Grimmspeed HiFlow Exhaust Manifold Crosspipe is a high-quality upgrade designed specifically for Subaru enthusiasts looking to improve their turbocharged vehicles’ exhaust flow and spool times. Compatible with 2006-2007 WRX and 2004-2008 Forester XT models, this crosspipe replaces the restrictive factory unit to unlock more responsive turbo performance. Whether you’re building a street-driven setup or a dedicated track car, this component helps maximize your Subaru’s forced induction potential by reducing exhaust backpressure and promoting smoother gas flow.

Built with a focus on durability and engineering excellence, Grimmspeed’s crosspipe features a robust 304 stainless steel construction with a thick 14-gauge pipe wall. Its design incorporates a 1.92″ tubing diameter optimized for efficient exhaust scavenging from cylinders 1 and 4, which are critical for turbo response. The triple-layer flex joint, strategically positioned away from bends, ensures long-term reliability under high-heat conditions and repeated movement. Grimmspeed’s reputation for platform-specific, high-performance parts shines through in this meticulously crafted component, making it a trusted choice for Subaru owners seeking consistent, measurable gains in turbo responsiveness and overall engine efficiency.

Installing this crosspipe not only enhances throttle response but also contributes to a more aggressive turbo spool, translating into quicker acceleration and improved power delivery. For those tuning their Subaru for performance, this upgrade provides a solid foundation for further modifications, ensuring your turbo system operates at its best. As a dedicated Subaru parts specialist, Subimods recommends this component for enthusiasts who demand reliability and performance in every drive.

Features & Specifications

This Grimmspeed HiFlow Crosspipe is engineered for Subaru WRX and Forester XT models, featuring a durable 304 stainless steel construction that withstands high temperatures and corrosion. Designed to improve exhaust flow and turbo response, it is ideal for Subaru owners seeking a reliable forced induction upgrade.

• Brand: Grimmspeed
• Product: HiFlow Exhaust Manifold Crosspipe Raw 2006-2007 WRX / 2004-2008 Forester XT
• Part Number: Not specified
• Fitment: Subaru WRX (2006-2007), Forester XT (2004-2008)
• Material: 304 Stainless Steel
• Finish: Raw (Uncoated)
• Construction: CNC Machined, Welded
• Origin: USA

• Power Gains: Not specified, but improves turbo response and spool
• Tuning Required: Recommended for optimal performance
• CARB Status: Not specified

Key Benefits

• Enhanced Turbo Response: Reduces exhaust restrictions for quicker spool and improved throttle feel, making every drive more engaging.
• Durable Construction: Heavy-duty 304 stainless steel with a thick 14-gauge wall ensures long-lasting performance under high heat and stress.
• Platform-Specific Fitment: Designed specifically for 2006-2007 WRX and 2004-2008 Forester XT, ensuring precise fitment and reliable operation.
• Improved Exhaust Flow: Optimized 1.92″ tubing from cylinders 1 and 4 enhances scavenging and reduces backpressure, supporting tuning and power upgrades.
• Long-Term Reliability: Triple-layer flex joint away from bends minimizes fatigue and cracking, providing peace of mind for daily drivers and enthusiasts alike.

What’s Included

• 1× Grimmspeed HiFlow Exhaust Manifold Crosspipe Raw
• Installation hardware (if applicable)
• Gaskets/seals (if included in kit)
• Installation instructions

Installation & Compatibility

This crosspipe is a direct bolt-on replacement for the factory unit on compatible Subaru WRX and Forester XT models. Installation is straightforward for those with basic mechanical skills, but professional installation is recommended to ensure proper fitment and sealing. The component requires no major modifications but verifying compatibility with your specific vehicle year and trim is advised. For optimal performance, pairing this upgrade with a tune is recommended to fully realize the gains in turbo response and spool. Basic hand tools and a lift or jack stand are sufficient for installation, but always follow safety procedures and consult a service manual if needed.

• Professional Installation: Recommended
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific year and model