Product Description

The Berklee BS0666 Sports Muffler is designed for rear exhaust applications requiring a single inlet and twin outlet configuration. Its chambered internal design helps reduce noise while maintaining smooth exhaust flow and a deep, balanced exhaust tone.

Product Specifications

• SKU: BS0666
• Inlet: 63mm (2.50")
• Outlet: 57mm (2.25") x 2
• Configuration: Offset inlet (right side) / twin offset outlets (bottom)
• Body Size: 250mm x 150mm (10" x 6")
• Body Length: 350mm (14")
• Design: Chambered
• Material: Aluminised Mild Steel
• Fitment: Universal (weld-in)
• Application: Suitable rear muffler replacement for Holden Commodore (driver side)
• Manufacture: Australian Made

How Mufflers Work (Technical Overview)

An exhaust muffler controls sound, flow, and backpressure by managing how exhaust gases exit the engine.

As exhaust gases leave the engine, they travel as high-pressure pulses. A muffler reduces noise by redirecting these pulses through internal chambers and baffles.

• Chambered Mufflers: Reduce noise and smooth exhaust pulses
• Straight-Through Mufflers: Maximise flow with a louder exhaust note
• Hybrid Designs: Balance sound control and performance

The Berklee BS0666 uses a chambered design, making it ideal for drivers wanting a refined exhaust tone without excessive noise.

Key Features

• Single Inlet / Twin Outlet: Ideal for dual outlet rear exhaust systems
• Chambered Design: Reduces noise and improves sound quality
• Oval Body: Increased internal volume for better sound control
• Vehicle-Suited Design: Common fitment for Holden Commodore rear muffler applications
• Australian Made: Proven Berklee manufacturing quality

Construction

• Material: Aluminised mild steel for durability and corrosion resistance
• Design: Internal chambered construction
• Finish: Aluminised coating

Fitment Notes

• Universal muffler – commonly used in Commodore rear exhaust setups
• Offset inlet and twin outlet configuration must match system layout
• Welding required for installation
• Ensure correct alignment and pipe sizing
• Professional installation recommended

Recommended With

• Exhaust Clamps – assist with positioning
• Exhaust Pipe – ideal for fabrication
• Mandrel Bends – maintain smooth airflow
• Exhaust Hangers & Rubber Mounts – reduce vibration
• Exhaust Gaskets – ensure leak-free joins
• Exhaust Sealant – improve sealing

Engine Airflow & Exhaust Design

Learn more: Engine Airflow & Exhaust Gas Expansion Guide

Emissions & Compliance Notice

This product is intended for off-road or performance use. Always verify emissions and registration compliance in your state or territory before installation.

What’s Included

• 1 x Berklee BS0666 Sports Muffler

Frequently Asked Questions

Is this muffler loud?
The BS0666 provides a deep, controlled exhaust note with reduced harshness compared to straight-through designs.

Is this suitable for Commodore?
Yes, it is commonly used as a rear muffler replacement for Holden Commodore (driver side).

Will it fit my vehicle?
Fitment depends on your exhaust layout, pipe size, and mounting position.

Is this muffler legal for my vehicle?
Check your state or territory regulations to ensure compliance before installation.

Is welding required?
Yes, this muffler is designed for weld-in installation.