GrimmSpeed V2 Non-Resonated Catback Exhaust 2015-2021 WRX / 2015-2021 STI

The GrimmSpeed Gentleman’s Exhaust returns with a redesigned Version 2.

This version is focused on improved install flexibility, long-term durability, and consistent sound characteristics. The V2 system introduces dual-overlapping slip fit connections paired with a revised dual-hanger mid-pipe design. This combination allows for increased adjustability during installation and improved sealing compared to traditional single-band clamp systems. The result is a more precise fitment across VA chassis vehicles and an easier install.

Internally, the mufflers have been updated with larger twin-tube perforated cores and an improved Y-splitter design to increase flow. A revised packing configuration was selected and validated to maintain tone consistency over extended use, preventing the degradation commonly seen in lower-quality systems.

Quick Specs

• Full 304 stainless steel exhaust construction

• TIG welded assembly for strength and consistency

• 409 stainless steel double-overlap slip fit clamps

• Custom twin-tube perforated core mufflers with increased flow capacity

• Updated internal Y-splitter design

• Quad 3.5” exhaust tips

• Dual-overlapping slip fit connections for improved sealing and adjustability

• Dual-hanger mid-pipe design for chassis-specific fitment control

• Includes polyurethane exhaust hangers to reduce movement

• Includes 304 stainless steel 2-bolt MLS gasket

Compatibility

• 2015–2021 Subaru WRX (VA Chassis)

• 2015–2021 Subaru STI (VA Chassis)