SPDZ1 Subaru WRX FA20 J-Pipe High Flow Downpipe Combo 2015-2021 6MT

Unlock the full potential of your FA20-powered WRX with the SPDZ1 J-Pipe Downpipe. Engineered for maximum exhaust flow and long-term durability, this catless downpipe is the perfect foundation for serious performance builds. Whether you’re chasing faster spool, stronger mid-range torque, or preparing for custom tuning, SPDZ1 delivers a superior solution compared to generic aftermarket options.

Key Features & Benefits:

• High-Flow Catless Design – Removes restrictions to deliver significant horsepower and torque gains across the powerband.

• True Stainless Steel Collector – 3.5” turbine outlet smoothly transitions into 3” mandrel-bent piping for frictionless flow and rapid turbo response.

• Integrated 90° O2 Spacer – Built onto the pipe to help reduce CELs without requiring extra adapters.

• Extra O2 Bung Included – Perfect for wideband sensors, making dyno sessions and ECU tuning effortless.

• Durable 304 Stainless Steel – TIG-welded with CNC-machined V-band flanges for a leak-free, precision fit.

• Flex Section Included – Helps absorb drivetrain movement, minimizing stress on welds, flanges, and hangers.

• Complete Installation Kit – Comes with all required gaskets and hardware for a true bolt-on installation. Now includes heat ring for turbo mating flange!

Specifications:

• 3.5” Stailness collector to 3” mandrel-bent piping

• V-band connection with clamp included

• Two-piece design for easier installation

• .38” thick CNC-machined flanges

• Handmade and TIG-welded craftsmanship

• Direct bolt-on for 2015–2021 Subaru WRX 6MT models only

⚠️ Note: This is a catless J-pipe intended for off-road/track use only. ECU tuning is strongly recommended for best performance and proper operation.

Pre-order item expected ETA late November 2027