Grimmspeed Gentleman’s Non-Resonated Catback V2 2015-2021 WRX / 2015-2021 STI | Refined Tone | Performance Exhaust System

Overview

The Grimmspeed Gentleman’s Non-Resonated Catback V2 is a meticulously engineered exhaust system designed specifically for the 2015-2021 Subaru WRX and WRX STI (VA chassis). This catback exhaust delivers a refined yet more pronounced exhaust note, ideal for enthusiasts seeking a balance between aggressive sound and everyday drivability. It is tailored for those who want to enhance their turbocharged Subaru’s auditory presence without the harshness or fatigue associated with louder, less sophisticated systems.

Building on the original Gentleman’s Exhaust philosophy, this updated version improves installation ease and fitment precision through dual-overlapping slip fit connections and a dual-hanger mid-pipe design. The system features custom mufflers with larger perforated cores and an updated internal Y-splitter to optimize flow and maintain a consistent tone over time. Crafted from high-quality stainless steel with TIG welded construction, it exemplifies Grimmspeed’s commitment to durability and performance refinement.

For Subaru owners, this non-resonated catback offers a noticeable upgrade in exhaust sound character while preserving the smooth, controlled tone that complements the WRX and STI’s sporty nature. Its design enhances exhaust flow, which can support power gains when paired with supporting modifications and proper tuning. The adjustable fitment allows precise tip positioning, ensuring the system integrates seamlessly with the vehicle’s chassis and styling.

Features & Specifications

This Grimmspeed Gentleman’s Non-Resonated Catback V2 is engineered for the 2015-2021 Subaru WRX and STI, featuring 304 stainless steel construction and dual-overlapping slip fit connections for superior sealing and adjustability. Constructed with TIG welded joints and custom twin-tube perforated mufflers, it delivers refined sound quality and improved exhaust flow for Subaru enthusiasts seeking a balanced performance exhaust upgrade.

• Brand: Grimmspeed
• Product: Gentleman’s Non-Resonated Catback V2 2015-2021 WRX / 2015-2021 STI
• Part Number: GRM.1025.1.0
• Fitment: 2015-2021 Subaru WRX (VA Chassis), 2015-2021 Subaru WRX STI (VA Chassis)
• Material: 304 Stainless Steel (exhaust components), 409 Stainless Steel (clamps)
• Finish: Polished quad 3.5-inch exhaust tips
• Construction: TIG welded with dual-overlapping slip fit connections
• Origin: Not specified
• Configuration: Non-resonated for a more aggressive exhaust note
• Muffler Design: Twin-tube perforated core with updated internal Y-splitter
• Flex Section: Stainless steel braided for compatibility across exhaust setups
• Mounting: Dual-hanger mid-pipe design with polyurethane exhaust hangers
• Included Gasket: 304 stainless steel 2-bolt MLS gasket

Key Benefits

• Performance: Improved exhaust flow with larger perforated muffler cores and updated Y-splitter supports potential power gains when paired with tuning.
• Sound Quality: Non-resonated design delivers a more pronounced yet refined exhaust note without harshness or fatigue.
• Fitment: Dual-overlapping slip fit connections and dual-hanger mid-pipe allow precise alignment and tip positioning for a perfect chassis-specific fit.
• Durability: High-grade 304 stainless steel construction with TIG welding ensures long-lasting strength and corrosion resistance.
• Installation: Includes polyurethane hangers and stainless steel hardware for stable mounting and reduced exhaust movement.
• Aesthetics: Quad polished 3.5-inch tips provide a clean, aggressive visual upgrade that complements the WRX and STI styling.

What's Included

• 2× Grimmspeed Mufflers
• 1× Grimmspeed Y-Pipe
• 1× Grimmspeed Non-Resonated Mid-Pipe
• 2× 2.5” Stainless Steel Double Overlap Slip Fit Clamps with Hardware
• 1× 3” Stainless Steel Double Overlap Slip Fit Clamp with Hardware
• 1× Grimmspeed 2-Bolt MLS Gasket
• 2× M10 Bolts
• 2× M10 Nuts
• 2× Grimmspeed License Plate Frames
• 1× Grimmspeed Decal
• Installation instructions

Installation & Compatibility

Installation of the Grimmspeed Gentleman’s Non-Resonated Catback V2 is moderately straightforward for those with basic mechanical skills and common hand tools, thanks to the dual-overlapping slip fit connections and included hardware. The dual-hanger mid-pipe design allows for fine-tuning fitment and tip positioning, reducing alignment challenges. No major modifications are required, but professional installation is recommended for optimal sealing and fitment. This exhaust system is compatible exclusively with 2015-2021 Subaru WRX and WRX STI models on the VA chassis. Tuning is recommended to maximize performance gains and ensure safe operation when combined with other supporting modifications.

• Professional Installation: Recommended
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific year and trim level within 2015-2021 WRX/STI VA chassis

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