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Flowmaster 40 Series™ Muffler 8042441

Flowmaster 40 Series™ Muffler 8042441
Flowmaster 40 Series™ Muffler 8042441Flowmaster 40 Series™ Muffler 8042441
$183.99 ea
NEWARRIVING SOONEstimated Ship Date 10/16/2023 (If Ordered Today)53 available from HOLLEY PERFORMANCE PRODUCTS as of 09/23/2023
Model: 4005254
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
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.
Features:
  • 409 Stainless Steel
  • Limited Lifetime Warranty
  • Aggressive And Powerful Exterior Exhaust Tone
  • Notable Interior Resonance
  • Excellent Street/Strip And Off Road Application
  • No Internal Packing To Blowout
  • The Original Two Chamber Design
  • Premium Flowmaster Quality
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Installation Notes:
Universal Muffler - Some adaptation may be required.
About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Downloads:

Download Name File Size
fm_warranty_general.pdf88.58KB
FM_Warranty_General.pdf88.58KB
NAFTA_COO-2013.pdf105.94KB
street_applications.pdf190.94KB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
Mercury Cougar Base 1969 7.0L / 428 / V8
6.4L / 390 / V8
5.8L / 351 / V8
5.0L / 302 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Base 1970 7.0L / 429 / V8
7.0L / 428 / V8
6.4L / 390 / V8
5.8L / 351 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Boss 302 1969 5.0L / 302 / V8 2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Boss 302 1970 5.0L / 302 / V8 2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Boss 429 1969 7.0L / 429 / V8 2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Boss 429 1970 7.0L / 429 / V8 2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Cobra Jet 1969 7.0L / 428 / V8 2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar Cobra Jet 1970 7.0L / 429 / V8
7.0L / 428 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar XR-7 1969 7.0L / 428 / V8
6.4L / 390 / V8
5.8L / 351 / V8
5.0L / 302 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar XR-7 1970 7.0L / 429 / V8
7.0L / 428 / V8
6.4L / 390 / V8
5.8L / 351 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar 1967 6.4L / 390 / V8
4.7L / 289 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar 1968 7.0L / 428 / V8
7.0L / 427 / V8
6.4L / 390 / V8
4.7L / 289 / V8
5.0L / 302 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar 1971 7.0L / 429 / V8
5.8L / 351 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar 1972 5.8L / 351 / V8 2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar 1973 7.5L / 460 / V8
6.6L / 400 / V8
5.8L / 351 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel
Mercury Cougar 1974 7.5L / 460 / V8
5.8L / 351 / V8
2.25 in. Offset Inlet/Center Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; 409 Stainless Steel

Specifications:

Automotive Item Grade High Performance
Body Height 4.000 in.
Body Height (in) 4
Body Length 13.000 in.
Body Length (in) 13
Body Width 9.750 in.
Body Width (in) 9.75
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Chemical Name 1 Nickel (Metallic)
California Proposition 65 Chemical Name 2 Chromium (hexavalent compounds)
California Proposition 65 Required Yes
Color Black
Emission Code 5
Finish Paint
Fitment Universal
Inlet Connection Type Pipe
Inlet Diameter 2.250 in.
Inlet Diameter (in) 2.25
Inlet Inside Diameter 2.250 in.
Inlet Outside Diameter 2.250 in.
Inlet Position Offset
Inlet Type Single Offset
Main Piping Diameter OEM
Material Stainless Steel
Mount Type Uses New Hangers (Not Included)
Muffler Series 40 Series
Muffler Type Reflection
Outlet Connection Type Pipe
Outlet Diameter 2.500 in.
Outlet Diameter (in) 2.25
Outlet Outside Diameter 2.250 in.
Outlet Position Center
Outlet Type Single Center Outlet
Overall Length 19.000 in.
Overall Length (in) 19
Part Type Exhaust Muffler
Reversible No
Shape Oval
Sound Level Aggressive
Tip Quantity 0
Type of Muffler Chambered
Vehicle Type Classic Muscle Car
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm
Warranty Limited Lifetime (Lifetime)

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