Flowmaster 40 Series muffler front view showing bold sound profile for muscle cars
Flowmaster 40 Series muffler side profile with aggressive exhaust look
Flowmaster 40 Series offset inlet/outlet for universal fitment illustration
Flowmaster 40 Series two-chamber design highlighting bold tone
Flowmaster 40 Series aluminized steel body emphasizing rugged durability
Flowmaster 40 Series muffler installed under vehicle for real-world look
Flowmaster 40 Series MIG-welded construction detail for reliability
Flowmaster 40 Series universal fitment options for multiple setups
Flowmaster 40 Series exhaust detail showing durable finish
Flowmaster 40 Series muffler front view showing bold sound profile for muscle cars
Flowmaster 40 Series muffler side profile with aggressive exhaust look
Flowmaster 40 Series offset inlet/outlet for universal fitment illustration
Flowmaster 40 Series two-chamber design highlighting bold tone
Flowmaster 40 Series aluminized steel body emphasizing rugged durability
Flowmaster 40 Series muffler installed under vehicle for real-world look
Flowmaster 40 Series MIG-welded construction detail for reliability
Flowmaster 40 Series universal fitment options for multiple setups
Flowmaster 40 Series exhaust detail showing durable finish

Flowmaster 40 Series Original Chambered Muffler – Aggressive Sound, 3” Offset In/Out, 16-Gauge Aluminized Steel

Overview Experience Flowmaster’s heritage with the 40 Series Original Chambered Muffler. Built for enthusiasts who crave a...
Vendor: Flowmaster
Availability: In stock
£144.80
£144.80
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Flowmaster 40 Series muffler front view showing bold sound profile for muscle cars

Flowmaster 40 Series Original Chambered Muffler – Aggressive Sound, 3” Offset In/Out, 16-Gauge Aluminized Steel

£144.80
Flowmaster 40 Series muffler front view showing bold sound profile for muscle cars
Flowmaster 40 Series muffler side profile with aggressive exhaust look
Flowmaster 40 Series offset inlet/outlet for universal fitment illustration
Flowmaster 40 Series two-chamber design highlighting bold tone
Flowmaster 40 Series aluminized steel body emphasizing rugged durability
Flowmaster 40 Series muffler installed under vehicle for real-world look
Flowmaster 40 Series MIG-welded construction detail for reliability
Flowmaster 40 Series universal fitment options for multiple setups
Flowmaster 40 Series exhaust detail showing durable finish

Flowmaster 40 Series Original Chambered Muffler – Aggressive Sound, 3” Offset In/Out, 16-Gauge Aluminized Steel

£144.80
Description
Description
x

Overview

Experience Flowmaster’s heritage with the 40 Series Original Chambered Muffler. Built for enthusiasts who crave a bold, unmistakable presence, this muffler combines classic sound with rugged durability to elevate muscle cars, street rods, trucks, and strip builds.

Sound and character

The two-chamber design channels exhaust through a centered system that yields a loud, aggressive bark while preserving road manners. It’s a recognizable tone that adds attitude without overpowering daily driving scenarios.

  • Legendary two-chamber design creates a punchy, recognizable tone.
  • Classic Flowmaster heritage delivers consistent street-ready character.

Performance and durability

Improved airflow and reduced back pressure can contribute to more responsive acceleration and a lively throttle feel. The muffler is crafted from 16-gauge aluminized steel and fully MIG-welded, with no internal packing to wear out, ensuring lasting integrity under heat and vibration.

  • Potentially enhanced horsepower and torque from freer airflow.
  • Durable, heat-resistant aluminum-steel construction for real-world use.
  • Strong MIG welds provide a robust, long-lasting build.

Fitment and installation

Designed for universal fitment, it offers multiple inlet/outlet configurations (center/offset, dual) to support a wide range of builds. This flexibility helps simplify installation for modern muscle cars, street rods, trucks, SUVs, and strip setups.

  • Flexible configurations for various exhaust layouts.
  • Good compatibility with custom and modified systems; adapters or minor mods may be needed for some vehicles.

Note: Benefits described reflect design intent and material choices. Actual results depend on the overall exhaust system, vehicle setup, and driving conditions.

FAQ

Q: What sound and performance can I expect from Flowmaster 40 Series?

A: It delivers a legendary, bold bark with an aggressive tone and improved airflow, potentially enhancing throttle response.

Q: Is the Flowmaster 40 Series easy to install on different vehicles?

A: Yes, with universal fitment options and multiple inlet/outlet configurations; some setups may require minor customization for optimal fit.

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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