The Regu.06&R (B22364W) is a full stainless-steel dual center exhaust system engineered for the Subaru WRX S4.

Developed to comply with Japan’s 2010 Acceleration Noise Regulation, this system delivers an enhanced, sporty exhaust note and improved flow while remaining street-legal, offering a perfect balance of performance and daily usability.

Product Highlights

🔰 JQR-CERTIFIED & STREET-LEGAL DESIGN
This exhaust system is JQR-certified (JQR40224141), confirming its performance, quality, and compliance. It is designed to be fully compliant with the 2010 Acceleration Noise Regulation, ensuring it is suitable and legal for use on public roads.

🔊 SPORTY & CONTROLLED SOUND PROFILE
Enhances the WRX S4’s character with a deeper, more assertive exhaust note, measured within legal limits:

• Nearby Exhaust Noise: 89 dB

• Idling Noise: 65 dB
  This provides an engaging auditory experience that complements the turbocharged FA24 engine without being intrusive.

🔧 COMPLETE DUAL CENTER PIPE SET FOR CVT MODELS
A comprehensive 4-piece “Rear piece + dual center pipe set” designed specifically for the CVT-equipped WRX S4. This complete system ensures a direct fit, optimal exhaust flow, and a significant visual upgrade over the factory setup.

🏗️ LIGHTWEIGHT STAINLESS STEEL CONSTRUCTION
Manufactured entirely from high-quality stainless steel for durability. The system offers a notable weight reduction over the stock unit:

• System Weight: 17.5 kg (OEM reference: 22.1 kg)

• Features a 170mm diameter round seamed muffler drum and dual 100mm tailpipes.

Technical Specifications & Application

This is a JQR-certified, street-legal full stainless steel exhaust system for the Subaru WRX S4.

Key Details

• Product Name: Regu.06&R Dual Center [’10 Acceleration Noise Regulation Compliant Model]

• Product Code: B22364W

• JAN Code: 4512355225312

• Stock Status: In stock

Vehicle Compatibility
WRX S4

• Chassis: 5BA-VBH (Acceleration noise regulation applicable vehicle)

• Engine: 2.4L Turbo (FA24)

• Drivetrain: 4WD (AWD)

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

• Transmission: CVT

• Model Years: From November 2021

Construction & Dimensions

• Material: All Stainless Steel

• Pipe Diameter: 60-50W

• Muffler Drum Diameter: 170 mm

• Tailpipe Diameter: 100 mm

• Exit Direction: Dual, Left & Right

• Number of Sections: 4

• Unit Weight: 17.5 kg

• Packaging Size: 1500 × 300 × 700 mm