Mustang FN 5.0L V8 2018-23 3in Full System Centre Hotdogs & Rear
MPI AutomotiveRRP$6985.53Mustang FN 5.0L V8 2018-23 3in Full System Centre Hotdogs & Rear Bi-modal Muffler 4in Quad Tip.
View partSSMBM678MF-BM
Mustang 5.0L V8 Dark Horse S650, 3in Dual Rear Mufflers With 5in Quad Tips & Electric
Mustang 5.0L V8 Dark Horse S650, 3in Dual Rear Mufflers With 5in Quad Tips & Electric Bimodals (SKU: SSMBM678MF-BM) Engineered.
BrandMantaMPI Automotive
Category: Mufflers and resonators
RRP pending
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- SSMBM678MF-BM
- Supplier
- MPI Automotive
- Category
- Mufflers and resonators
- Stock status
- In stock at supplier
The MPI Automotive SSMBM678MF-BM is a valved pair of 3in dual rear mufflers with electric bi-modal valves and 5in quad tips, listed to fit the Mustang 5.0L V8 Dark Horse (S650). The bi-modal valving is the point: it switches between quiet and loud.
What does a bi-modal valved muffler actually do?
A bi-modal muffler runs electric valves that open and close inside the rear cans. Closed, exhaust takes the longer, more muffled path and the note stays civil for a cold start or a quiet street; open, it short-cuts to the freer route and the V8 gets to breathe. That switchability is why this SSMBM678MF-BM exists as the valved option — you get the subdued setting for the neighbours and the loud setting when you want it, on the same hardware. The design intent is a louder ceiling than a fixed muffler with a quiet floor underneath it.
How do the 5in quad tips and 3in piping fit the Dark Horse?
This unit is built around 3in piping and finishes through 5in quad tips, so it presents four outlets at the rear in the four-pipe style the S650 Dark Horse wears. The 3in bore is sized for the 5.0L V8's output, and the dual rear-muffler layout keeps the left and right banks balanced. It's listed to fit the Mustang Dark Horse S650; send your build and we'll confirm the tailpipe and valve harness before booking.
Is it road legal?
This is a rear-muffler section, not a cat-back or a cat-delete — it doesn't touch the catalytic converter or any emissions hardware, so the cat-delete off-road rules don't apply here. That said, a switchable louder setting can put a car outside noise limits depending on how it's used, so confirm the in-service noise expectations and any state requirements with the workshop before you commit.
What does fitting and pricing involve at our Illawarra workshop?
Oak Flats Muffler Men fits valved Mustang rear sections in-house across the Illawarra, including wiring up the electric bi-modal valves and aligning the quad tips evenly in the rear bumper. Pricing on the SSMBM678MF-BM isn't published by the supplier yet, so it's a special-order quote — talk to us for the current price and lead time when you book the bay.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- What's the advantage of the bi-modal valves on the SSMBM678MF-BM?
- The electric valves let the exhaust switch between a quieter muffled setting and a louder open setting, so you aren't locked into one volume the way you are with a fixed muffler.
- Will it fit my Mustang Dark Horse?
- It's listed to fit the Mustang 5.0L V8 Dark Horse (S650). Confirm your exact variant and the valve wiring with the workshop before ordering.
- How much is it?
- The supplier hasn't published an RRP yet, so it's a special-order item. Contact Oak Flats Muffler Men for a current quote and lead time.
Fitment support across the Illawarra
Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.Show nearby fitment areasCollapse section
Oak Flats Muffler Men can check this part against supplier specs, part number, image, RRP and vehicle details for customers around Oak Flats, Shellharbour, Wollongong, Dapto, Albion Park, Kiama and the northern suburbs.
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