Street Max - SM11568 4"x9" Oval Body Muffler - 2.5" Dual In / 2.5" Dual Out

Built for performance without the unwanted noise.

 

 

 

 

 

The Street Max SM11568 muffler is designed to deliver a deep, aggressive exhaust tone while keeping interior drone and harsh high-frequency rasp under control. Whether you’re daily driving or pushing your build harder, this muffler provides a clean, refined sound without sacrificing performance.

 

 

Key Features

• Straight-through core design for optimal exhaust flow

• Helps support improved horsepower and torque

• 16-gauge 409-grade stainless steel construction for durability

• High-heat thermal mesh for sound control and longevity

• Reversible design for flexible installation

• Engineered to reduce interior drone

• Produces a deep, mild performance tone

 

 

Performance-Focused Design

At its core, the Street Max muffler uses a straight-through design to minimize restriction and maximize exhaust flow.

The addition of high-heat thermal mesh helps control sound while maintaining durability under high temperatures — preventing common issues like internal blowout over time.

 

The result is a balanced exhaust note:

• Deep and refined under normal driving

• Noticeable under throttle

• Controlled without excessive drone or rasp

 

 

Ideal For

• Daily driven performance vehicles

• Builds looking for improved exhaust tone without harshness

• Drivers wanting a balance of sound and comfort

• Custom exhaust setups requiring dual in / dual out configuration

 

 

Fitment & Specifications

• 4” x 9” oval body

• 28” overall length

• 22” body length

• 2.5” dual inlet / 2.5” dual outlet

 

 

Package Details

• Dimensions: 29” x 10” x 4.5”

• Weight: 13 lbs

 

 

Exhaust Muffler FAQs

 

What does a straight-through muffler do?

A straight-through design allows exhaust gases to flow more freely, reducing restriction and helping support performance gains.

 

Will this muffler be loud?

It produces a deeper, more aggressive tone than stock, but is designed to remain controlled without excessive volume or rasp.

Does this reduce drone inside the cabin?

Yes — the internal design and thermal mesh help minimize interior drone during cruising.

 

Is stainless steel important for a muffler?

Yes — 409-grade stainless steel offers strong durability and corrosion resistance, making it suitable for long-term use.

 

 

Why Choose Boosted Mentality Motorsports?

Because performance isn’t just about louder — it’s about better!