Flowmaster 942440 Exhaust Muffler

Part Number
40 Series Delta Flow Muffler; 2.25 in. Center Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel
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This two chamber design incorporates Flowmaster's patented Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over Original 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.

BRAND: Flowmaster


  • Universal Muffler - Not a direct fit. Some adaptation required.
  • 40 Series™ Delta Flow Muffler; 2.25 in. Center Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel;
  • Exhaust Muffler
  • 40 Series™ Delta Flow Muffler
  • Durable Fully Welded 16ga Aluminized Steel
  • Race Proven Patented Delta Flow® Technology
  • 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
  • Excellent Street/Strip And Off Road Application
  • No Internal Packing To Blowout
  • Muffler 40 Delta 2.25in C/C
  • Chambered; Exhaust; Performance muffler; muffler; flowmaster; race muffler; universal muffler; magnaflow; borla; gibson; stainless exhaust; stainless muffler; tuned muffler; sport muffler; tuner; tuned exhaust; exhaust upgrade; performance upgrade


Automotive Item GradeHigh Performance
Body Height4.000 in.
Body Length13.000 in.
Body Width9.750 in.
Inlet Connection TypePipe
Inlet Diameter2.250 in.
Inlet Inside Diameter2.250 in.
Inlet Outside Diameter2.250 in.
Inlet PositionCenter
Inlet TypeSingle Center
Main Piping Diameter2.250 in.
MaterialAluminized Steel
Mount TypeUses New Hangers (Not Included)
Muffler Series40 Series Delta Flow
Muffler TypeReflection
Outlet Connection TypePipe
Outlet Diameter2.500 in.
Outlet Outside Diameter2.250 in.
Outlet PositionCenter
Outlet TypeSingle Center Outlet
Overall Length19.000 in.
Sound LevelAggressive
Tip Quantity0
TitleFlowmaster 942440 40 Delta Flow Muffler - 2.25 Center In / 2.25 Center Out - Aggressive Sound
WARNING CA Proposition 65No



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