The Regu.06&R (B22354W) is a JQR-certified full stainless-steel dual exhaust system engineered for the Subaru WRX STI (6MT) and WRX S4 (CVT).

Designed as a complete “rear piece + dual center pipe set,” it delivers a sportier exhaust tone, improved performance, and a sleek dual-exit appearance, all while maintaining full compliance with Japan’s 2010 Acceleration Noise Regulation for street-legal use.

Product Highlights

🔰 OFFICIAL JQR CERTIFICATION FOR DUAL APPLICATIONS
This system carries official JQR certification (JQR40153007), validating its performance, quality, and legal compliance for both the WRX STI and WRX S4 platforms. It is engineered to meet stringent noise regulations, providing a guaranteed legal upgrade for road use.

🔊 BALANCED, PLATFORM-OPTIMIZED SOUND
Delivers a refined yet sporty exhaust character tailored to each model’s engine note, operating within certified legal limits:

For WRX STI (EJ20 2.0L Turbo):

• Nearby Exhaust Noise: 92 dB

• Idling Noise: 74 dB

For WRX S4 (FA20 2.0L Turbo):

• Nearby Exhaust Noise: 87 dB

• Idling Noise: 61 dB

This ensures an engaging auditory enhancement that complements the unique character of both the high-revving EJ and the direct-injected FA engines.

🔧 COMPLETE DUAL CENTER PIPE SET
A comprehensive 3-piece system that replaces the factory exhaust from the center section back. This complete “rear piece + dual center pipe set” ensures optimized exhaust flow for potential performance gains and a seamless, direct-fit installation.

🏗️ LIGHTWEIGHT CONSTRUCTION WITH ROUND SEAMED DRUM
Manufactured from durable stainless steel, the system offers significant weight savings and features a quality 170mm diameter round seamed muffler drum:

• System Weight: 16.7 kg (OEM reference: 22.6 kg)

• Weight Reduction: Approximately 5.9 kg

• Finished with dual 100mm straight-cut tailpipes for a clean, performance-oriented look.

Technical Specifications & Application

This is a JQR-certified, street-legal full stainless steel dual exhaust system for specified Subaru models.

Key Details

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

• Product Code: B22354W

• JAN Code: 4512355209442

• Stock Status: In stock

Vehicle Compatibility
WRX STI (6MT)

• Chassis: CBA-VAB (Acceleration noise regulation applicable vehicle)

• Engine: 2.0L Turbo (EJ20)

• Drivetrain: 4WD (AWD)

• Grade: STI (including Type S)

• Transmission: 6MT

• Model Years: August 2014 – April 2020

• Note: Fitment is not confirmed and is not JQR-certified for S207, S208, and TYPE RA-R models.

WRX S4 (CVT)

• Chassis: DBA, 3BA-VAG (Acceleration noise regulation applicable vehicle)

• Engine: 2.0L Turbo (FA20)

• Drivetrain: 4WD (AWD)

• Grade: 2.0GT(-S) EyeSight, STI Sport EyeSight (Compatible with tS and STI Sport models)

• Transmission: CVT

• Model Years: August 2014 – March 2021

Construction & Dimensions

• Material: All Stainless Steel

• Pipe Diameter: 60-50W

• Muffler Drum: 170 mm diameter (Round Seamed)

• Tailpipe Diameter: 100 mm

• Exit Direction: Dual, Left & Right (Straight-cut)

• Number of Sections: 3

• Unit Weight: 16.7 kg

• Packaging Size: 2200 × 350 × 784 mm

• Packaging Weight: 26.7 kg