Flowmaster
Flowmaster 2.5 IN(O)/OUT(C) Super 40 SS Muffler
Flowmaster 2.5 IN(O)/OUT(C) Super 40 SS Muffler
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Developed from our Top Ten race muffler lineup for use on the street/strip, the Super 40® features Flowmaster's Delta Flow® technology. It's larger case profile provides the best of both worlds of performance and sound, especially on forced induction and high horsepower vehicles. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow® technology. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
- Excellent performance on high horsepower vehicles
- Durable fully welded 409SS stainless steel
- Deep Aggressive Sound Exhaust Note
- Noticeable interior resonance
Vehicle Fitment
Fits 6 makes, 1979-2013 — click to view all 23 models
- 1979 Dodge D100
- 1979-1980 Dodge D200
- 1979-1980 Dodge D300
- 1979-1992 Dodge D150
- 1981-1992 Dodge D250
- 1981-1992 Dodge D350
- 1986-1989 Dodge D100
- 1987 Ford F-250
- 1988-1992 Chevrolet C2500
- 1988-1992 Chevrolet K2500
- 1988-1992 GMC C2500
- 1988-1992 GMC K2500
- 1989 Dodge W100
- 1989-1992 Dodge W150
- 1989-1992 Dodge W250
- 1989-1992 Dodge W350
- 1990-1991 Dodge Dakota
- 1994-1997 Ford F-350
- 1994-1998 Ford F-250
- 1999 Ford F-350 Super Duty
- 2000-2006 Toyota Tundra
- 2005-2007 Nissan Armada
- 2011-2013 Dodge Charger
Please verify exact fitment for your trim and engine before ordering.
🚚 Vendor Direct Shipment: This item is not stocked in our warehouse and ships directly from the manufacturer. Please allow additional handling time before dispatch.
Manufacturer Part Number: 852546
Images are for illustrative purposes only. Actual product may vary.
⚠ WARNING (California Proposition 65): This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
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Manufacturer's Warranty — Flowmaster
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Manufacturer's Warranty — Flowmaster
Flowmaster warranty is tiered by material and product line. Lifetime Limited Warranty — stainless steel mufflers (FlowFX series excepted), all stainless steel exhaust systems (FlowFX included), stainless steel pipes, air intake kits and oiled-type filters (cleaning kits excepted), and other stainless steel exhaust accessories (exhaust tips and racing products excepted); this runs for the life of the original vehicle the part was installed on. Three (3) years — aluminized steel mufflers, exhaust systems and pipes, all exhaust tips, other non-race exhaust accessories, and commercial-vehicle applications of aluminized or stainless products. Two (2) years — Delta Force dry air intake filter elements. One (1) year — FlowFX series mufflers, Elite Series headers, and electronic components such as Delta Boost modules. Catalytic converters sold under the Flowmaster brand are excluded from this warranty. Coverage runs from the date of original purchase, to the original purchaser only, and only while the part remains on the vehicle it was originally installed on. Header coverage does not extend to damage caused by exhaust insulating wrap and is void if the header was fitted to a new or rebuilt engine during the initial break-in period. Sound-absorbing material inside “straight-through” mufflers degrades over time; Flowmaster treats that as normal wear, not a material defect. Also excluded: interior and exterior sound levels, cosmetic issues such as coatings and material discoloration, installation on a racing vehicle, improper installation or installation contrary to Flowmaster instructions, alteration, misuse, repair, accident, collision, undercarriage road impact or debris, and willful or negligent acts. To claim, the original purchaser returns the product either to the original retailer or directly to Flowmaster — a Returned Material Authorization (RMA) number must be obtained from Flowmaster first if returning to them — with proof of purchase showing place, price, product and date. Flowmaster's remedy is exchange for the same part number or refund of the purchase price at its option; installation, labor, towing and shipping costs are not covered.
Warranty terms are set by the manufacturer and may change. Full details and claims are handled directly by Flowmaster. Contact us if you need help with a warranty claim.

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