Flowmaster
Flowmaster 2.25 IN(O)/OUT(C) 40 Series SS Muffler
Flowmaster 2.25 IN(O)/OUT(C) 40 Series SS Muffler
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The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
- Excellent Street/Strip and Off Road application
- Durable fully welded 409SS stainless steel
- Aggressive Sound Exterior Exhaust Tone
- Noticeable Interior Resonance
Vehicle Fitment
Fits 13 makes, 1960-2010 — click to view all 33 models
- 1960-1970 Ford Fairlane
- 1967-1970 Plymouth GTX
- 1967-1973 Mercury Cougar
- 1968-1970 Plymouth Road Runner
- 1968-1974 Ford Torino
- 1969-1974 Dodge Dart
- 1970-1974 Dodge Challenger
- 1970-1974 Plymouth Duster
- 1973 Chevrolet Chevelle
- 1973-1977 Oldsmobile Cutlass
- 1973-1977 Pontiac LeMans
- 1974-1977 Chevrolet Caprice
- 1974-1977 Chevrolet Impala
- 1975-1986 Ford F-150
- 1975-1986 Ford F-250
- 1975-1986 Ford F-350
- 1978-1980 Buick Regal
- 1983-1990 GMC S15
- 1983-1991 GMC S15 Jimmy
- 1983-1994 Chevrolet S10 Blazer
- 1983-1997 Chevrolet S10
- 1986-1987 Buick Regal
- 1990-2007 Mitsubishi Eclipse
- 1991-1992 Ford Explorer
- 1992-1997 GMC Jimmy
- 2001-2007 Subaru Impreza
- 2001-2010 Chrysler PT Cruiser
- 2001-2010 Ford Explorer
- 2005-2010 Chevrolet Cobalt
- 2006-2007 Chevrolet Impala
- 2006-2007 Chevrolet Monte Carlo
- 2007 Toyota Solara
- 2010 Ford Taurus
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: 8042441
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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