Flowmaster 40 Series


Flowmaster 42541

Exhaust Muffler; 40 Series (TM) Original; 9-3/4 Inch Width X 4 Inch Height Black Coated Aluminized Steel Case; Single 2-1/2 Inch Offset Inlet; Single 2-1/2 Inch Center Outlet; 13 Inch Body/19 Inch Overall Length; Modifications To The Exhaust System May Be Necessary For Installation
SKU: 42541 Category: Brand


The original Flowmaster 40 series muffler delivers an aggressive exterior and interior tone. If you are looking for that original “Flowmaster sound” this is the muffler is for you. This is Flowmaster’s most popular muffler for that old muscle car tone. Place an order or make an appointment to change your life.

PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov

Flowmaster 40 Series Muffler

Shape: Oval
Inlet Position: Offset
Inlet Diameter (IN): 2-1/2 Inch
Outlet Position: Center
Outlet Diameter (IN): 2-1/2 Inch
Overall Length (IN): 19 Inch
Color/ Finish: Aluminized Gray
Case Diameter (IN): 9-3/4 Inch X 4 Inch
Case Length (IN): 13 Inch
Material: Steel
Includes Tip: No
Tip Length (IN): No Tip
Tip Diameter (IN): No Tip
Tip Finish: No Tip
Tip Material: No Tip
Wall Type: Single Wall
Internal Construction: Two Chambered
  • Durable Fully Welded 16 Gauge Aluminized Steel
  • Aggressive And Powerful Exterior Exhaust Tone
  • Notable Interior Resonance
  • Excellent Street/Strip And Off Road Application
  • No Internal Packing To Blowout
  • Limited 3 Year Warranty

Visit a FMS Performance Center today and pick up the all new Flowmaster 40 series muffler

We offer FREE shipping on this product.  For professional installation near San Bernardino, Redlands, Riverside give us a call at 909-888-5020 Near Palm Springs, Cathedral City, Rancho Mirage, Palm Desert, Indio call 760-321-2896 All other areas call 1-800-833-0945 or click a link below.

Additional information

Weight 10 lbs