Flowmaster 40-Series muffler front view showcases bold sound for muscle cars.
Flowmaster 40-Series muffler side profile demonstrates compact fit for trucks and SUVs.
Flowmaster 40-Series two-chamber design delivers signature aggressive tone for street rods.
Flowmaster 40-Series dual-outlet configuration enhances exhaust flow and distinctive rumble.
Flowmaster 40-Series 16-gauge steel body ensures durable performance under heat.
Flowmaster 40-Series MIG-welded seams resist vibration and prevent leaks.
Flowmaster 40-Series center-inlet with 2.50 in dual-outlet connects to custom exhausts.
Flowmaster 40-Series universal fitment suits many modern builds.
Flowmaster 40-Series ready-to-install muffler for muscle cars and trucks.
Flowmaster 40-Series muffler front view showcases bold sound for muscle cars.
Flowmaster 40-Series muffler side profile demonstrates compact fit for trucks and SUVs.
Flowmaster 40-Series two-chamber design delivers signature aggressive tone for street rods.
Flowmaster 40-Series dual-outlet configuration enhances exhaust flow and distinctive rumble.
Flowmaster 40-Series 16-gauge steel body ensures durable performance under heat.
Flowmaster 40-Series MIG-welded seams resist vibration and prevent leaks.
Flowmaster 40-Series center-inlet with 2.50 in dual-outlet connects to custom exhausts.
Flowmaster 40-Series universal fitment suits many modern builds.
Flowmaster 40-Series ready-to-install muffler for muscle cars and trucks.

Flowmaster 40 Series Original Chambered Muffler – 3.00 in Center In / 2.50 in Dual Out – Aggressive Sound, 16-Gauge Steel

Flowmaster 40 Series Original Chambered MufflerFlowmaster's 40 Series Original Chambered Muffler is a classic upgrade for enthusiasts...
Vendor: Flowmaster
Availability: In stock
£144.80
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Flowmaster 40-Series muffler front view showcases bold sound for muscle cars.

Flowmaster 40 Series Original Chambered Muffler – 3.00 in Center In / 2.50 in Dual Out – Aggressive Sound, 16-Gauge Steel

£144.80
Flowmaster 40-Series muffler front view showcases bold sound for muscle cars.
Flowmaster 40-Series muffler side profile demonstrates compact fit for trucks and SUVs.
Flowmaster 40-Series two-chamber design delivers signature aggressive tone for street rods.
Flowmaster 40-Series dual-outlet configuration enhances exhaust flow and distinctive rumble.
Flowmaster 40-Series 16-gauge steel body ensures durable performance under heat.
Flowmaster 40-Series MIG-welded seams resist vibration and prevent leaks.
Flowmaster 40-Series center-inlet with 2.50 in dual-outlet connects to custom exhausts.
Flowmaster 40-Series universal fitment suits many modern builds.
Flowmaster 40-Series ready-to-install muffler for muscle cars and trucks.

Flowmaster 40 Series Original Chambered Muffler – 3.00 in Center In / 2.50 in Dual Out – Aggressive Sound, 16-Gauge Steel

£144.80
Description
Description
x

Flowmaster 40 Series Original Chambered Muffler

Flowmaster's 40 Series Original Chambered Muffler is a classic upgrade for enthusiasts who want a bold street presence. The design emphasizes a deep, aggressive bark that makes an impression as soon as the exhaust wakes up. This is the kind of sound that complements bold engine builds without overwhelming interior comfort.

Signature sound and design

The muffler uses Flowmaster's recognizable two-chamber internal layout. This arrangement shapes a pronounced, authoritative tone that suits modern muscle cars, street rods, trucks, off-road rigs, and custom builds. The result is a balanced, assertive exhaust voice that can stand up to a tuned powertrain.

  • Bold, unmistakable tone that suits muscular platforms
  • Two-chamber design creates a defined, aggressive character

Performance and durability

Constructed from 16-gauge aluminized steel and fully MIG-welded, the body is built to endure heat and vibration. There is no internal packing to blow out or wear down, which helps maintain the original sound and performance characteristics over time.

  • Improved airflow with reduced back pressure can enhance throttle response
  • Rugged build resists heat and road vibration for daily driving and track days

Fitment and installation

The Flowmaster 40 Series is designed for universal fitment with multiple inlet/outlet options and configurations (center or offset, dual). This flexibility helps simplify integration with existing exhaust systems and customized builds.

  • Center-inlet and dual-outlet options support diverse setups
  • Ideal for muscle cars, street rods, trucks, SUVs, and strip builds

Whether you are chasing a distinctive voice, a more engaging driving experience, or simply a durable, proven muffler, this Flowmaster option offers a compelling combination of heritage and performance. Note that results can vary by vehicle and setup, and no claims are guaranteed.

FAQ

Q: What makes the Flowmaster 40 Series Original Chambered Muffler stand out?

A: Its two-chamber design and rugged 16-gauge aluminized steel deliver a bold, signature exhaust tone and durable performance.

Q: Is this muffler suitable for universal, customized exhaust setups?

A: Yes—its universal fitment and multiple inlet/outlet configurations support a wide range of muscle cars, street rods, trucks, and strip builds.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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