Exhaust› Mufflers and Resonators
Flowmaster
40 Series Delta Force Race Muffler Top Ten Race Muffler 409SS 4.00 Center In 4.00 Center Out Aggressive Sound Flowmaster
SKU: F00L 854040-10
Moderate — 2–4 hours
Description
Part #: 854040-10
The Delta Force 40 series race mufflers utilize Flowmaster's Delta Flow technology and feature excellent power characteristics with good sound reduction qualities. Recommended for all racing applications where mufflers are required with a substantial decibel reduction over open headers.Race proven Delta Flow technologyNo internal packing to blowoutGood decibel reduction over open headersDurable fully welded 16 gauge stainless steel - two chamber race muffler
Features:
- Durable Fully Welded 16ga Stainless Steel
- Race proven Delta Flow technology
- Two Chamber Race Muffler
- No internal packing to blowout
- Good Decibel Reduction Over Open Headers
- Good decibel reduction over open headers
- Race Proven Patented Delta Flow (R) Technology
- Durable fully welded 16 gauge stainless steel - two chamber race muffler
- No Internal Packing To Blowout
40 Series (TM) Delta Force Top Ten Race Muffler | 4.0 in. Center Inlet/Outlet | Case Dimensions 5.0 in. x 10.0 in. x 13.0 in. | 19.0 in. Overall Length | 409 Stainless Steel
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Fitment
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Specifications
| Brand | Flowmaster |
| Part Number | F00L 854040-10 |
Videos
The ONLY Flowmaster Video you NEED to watch
Flowmaster 40 Series Delta Flow Mufflers Review - SEMA 2013
3" Flowmaster 40's vs Delta Flow 50's - Big Block Chevelle
Old Muffler Battle - FLOWMASTER Delta Vs. 40 Series Chambered - Who Sounds Better?
Flowmaster Super 40 Series Muffler Sound Test
Flowmaster comparison 40 vs 50 series
FlowMaster 40s vs 40 Series Delta Flows on a Fox Body Mustang
Flowmaster Muffler Comparison : Muffler Shootout 2
How to Select the Right Flowmaster Muffler - Series Differences Explained
Flowmaster Pro Series Muffler Sound Test
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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