Exhaust› Mufflers and Resonators

Flowmaster

40 Series Delta Flow Chambered Muffler 40 Delta Flow 2.25 Offset In 2.25 Same Side Out -Aggressive Sound Flowmaster

$356.62

SKU: F00L 942444

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

This two-chamber muffler features Flowmaster's patented Delta Flow technology, designed to enhance scavenging for improved performance and reduced interior sound. It delivers a milder exterior tone and less interior resonance than the original 40 Series. Constructed from 16-gauge aluminized steel and fully MIG welded for maximum durability. It is a universal fitment part that does not affect vehicle emissions.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandFlowmaster
Part NumberF00L 942444

Videos

Old Muffler Battle - FLOWMASTER Delta Vs. 40 Series Chambered - Who Sounds Better?

Old Muffler Battle - FLOWMASTER Delta Vs. 40 Series Chambered - Who Sounds Better?
Flowmaster 40 Series Delta Flow Mufflers Review - SEMA 2013

Flowmaster 40 Series Delta Flow Mufflers Review - SEMA 2013
FlowMaster 40s vs 40 Series Delta Flows on a Fox Body Mustang

FlowMaster 40s vs 40 Series Delta Flows on a Fox Body Mustang
3" Flowmaster 40's vs Delta Flow 50's - Big Block Chevelle

3" Flowmaster 40's vs Delta Flow 50's - Big Block Chevelle
Flowmaster 40 Series Delta Flow Muffler Review

Flowmaster 40 Series Delta Flow Muffler Review
FlowMaster 40 vs 50 delta flow on a Fox Body Mustang

FlowMaster 40 vs 50 delta flow on a Fox Body Mustang
RAM Hemi Flowmaster 40 Series Delta Flow

RAM Hemi Flowmaster 40 Series Delta Flow

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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