The Regu.06&R B22364R is a premium, JQR-certified axle-back exhaust section engineered for the Subaru WRX S4 (VBH chassis) with the FA24 turbocharged engine.

Designed as a rear-piece-only upgrade, this system delivers a deeper, more resonant exhaust note, a commanding dual-exit appearance with 100mm tips, and significant weight reduction—all while achieving exceptionally low sound levels and guaranteed compliance with stringent road regulations.

Product Highlights

✅ OFFICIAL JQR CERTIFICATION FOR ROAD LEGALITY
Carrying official JQR certification (JQR20222140), this axle-back system guarantees full compliance with Japan’s 2010 acceleration noise regulations. It is a verified legal upgrade that enhances your vehicle’s sound and style without any on-road compromise, ideal for the sophisticated performance sedan.

🔊 EXCEPTIONALLY REFINED AND QUIET ACOUSTICS
Engineered to deliver a deeper, richer exhaust tone that complements the turbocharged FA24 engine, while achieving impressively low sound levels for a premium daily driving experience:

• Nearby Exhaust Noise: 87 dB

• Idling Noise: 60 dB

🔧 AXLE-BACK DESIGN FOR SIMPLE UPGRADE
A “rear piece only” design that replaces the factory muffler and tailpipe section, offering a straightforward, bolt-on performance and aesthetic upgrade for the WRX S4.

• Simple Installation: Direct bolt-on to the existing mid-pipe connection.

• Compatible with: Subaru WRX S4 (VBH) GT-H and STI Sports R (including EX) grades.

⚖️ SIGNIFICANT WEIGHT REDUCTION
Crafted from high-quality stainless steel, this 2-piece system achieves a substantial reduction in mass over the heavy OEM unit, contributing to improved vehicle efficiency and handling dynamics.

• System Weight: 8.6 kg (OEM Reference Weight: 14.8 kg)

• Weight Saved: ~6.2 kg (Approximately 42% reduction)

Technical Specifications & Application

This is a JQR-certified, road-legal axle-back exhaust section for the Subaru WRX S4 (VBH).

Key Details

• Product Name: Regu.06&R Axle-Back Exhaust System

• Product Code: B22364R

• JAN Code: 4512355225275

• Stock Status: In Stock

Vehicle Compatibility
SUBARU WRX S4 (VBH)

• Chassis Code: 5BA-VBH

• Engine: 2.4L Turbocharged (FA24)

• Drivetrain: AWD

• Grades: GT-H, STI Sports R (including EX)

• Model Years: From November 2021

• Transmission: CVT

Construction & Dimensions

• Material: Full Stainless Steel

• Pipe Configuration: Dual 50mm pathways

• Resonator Drum: 170mm diameter (round seamed drum)

• Tailpipe Diameter: 100mm (Dual Tips)

• Exit Configuration: Dual Tips (Left & Right)

• Assembly Sections: 2

• Product Weight: 8.6 kg

• Packaged Dimensions: 1200 mm × 400 mm × 450 mm