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GrimmSpeed V2 GESI Catted Front J Pipe

Subaru WRX VA 15-21 (6MT)
$1,614.15
RRP $1,899.00 (Save 15%)

Description

GrimmSpeed Version 2 GESI J-Pipe | 2015–2021 Subaru WRX (FA20DIT)

Upgrading an already-proven design was no small task — but the GrimmSpeed V2 GESI J-Pipe brings refinements that make it one of the most advanced and well-engineered WRX J-Pipes available today.

The original V1 was celebrated for its 3" 304 stainless steel construction, 1/2" flanges, and exceptional fitment. Version 2 builds upon that foundation, delivering major improvements in flow, installation, durability, and ground clearance. This is the future of GrimmSpeed exhaust upgrades — and the first of many to come.

Refined 2-Piece Design

The V2 J-Pipe is now engineered as a 2-piece assembly. This reduces manufacturing costs while offering a huge benefit to installers — no more wrestling with a 6-foot pipe. Solo installations are now fast, stable, and frustration-free.

High-Flow Cast Steel Collectors

  • Optimized exhaust flow through precision-cast geometry
  • Features GrimmSpeed-stamped branding
  • Includes a 3rd O₂ bung for wideband or aftermarket sensors
  • Improved ground clearance — +1 inch vs V1, crucial for lowered WRXs

Upgraded GESI Catalytic Converter

All V2 systems include a premium high-flow GESI cat positioned similarly to OEM for:

  • Better catalyst efficiency
  • Reduced emissions and exhaust odor
  • Consistent performance with boost and heat

Real-world testing showed no catalyst efficiency CEL on properly maintained vehicles (results may vary based on setup).

What’s Included

  • GrimmSpeed V2 GESI J-Pipe (2-piece)
  • GESI Catalyst integrated
  • Stainless turbo studs
  • All required gaskets & hardware

Features and Benefits

  • GESI High-Flow Catalytic Converter (standard)
  • Premium 3" 304 stainless steel construction
  • 1/2" thick flanges for long-term reliability
  • Cast steel collectors with optimized flow paths
  • 2-piece layout for easier install
  • Third O₂ sensor bung for aftermarket gauges
  • Grounding strap mount — maintains OEM functionality
  • Custom stainless turbo studs included
  • Hardware & gaskets included for installation
  • Tuning recommended for best performance

Note: 3"-to-OEM exhaust adapter required when retaining factory cat-back system.

Fitment Table