Flowmaster 942540 Exhaust Muffler

40 Series Delta Flow Muffler; 2.5 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


  • 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
  • Durable Fully Welded 16ga Aluminized Steel
  • Excellent Street/Strip And Off Road Application
  • No Internal Packing To Blowout
  • 40 Series™ Delta Flow Muffler
  • Race Proven Patented Delta Flow® Technology
  • Muffler 40 Delta 2.5in 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
  • Universal Muffler - Not a direct fit. Some adaptation required.
  • Exhaust Muffler
  • 40 Series™ Delta Flow Muffler; 2.5 in. Center Inlet/Outlet; Case Dimensions 4 in. x 9.75 in. x 13 in.; 19 in. Overall Length; Aluminized Steel;


Automotive Item GradeHigh Performance
Body Height4.000 in.
Body Length13.000 in.
Body Width9.750 in.
Inlet Connection TypePipe
Inlet Diameter2.500 in.
Inlet Inside Diameter2.500 in.
Inlet Outside Diameter2.500 in.
Inlet PositionCenter
Inlet TypeSingle Center
Main Piping Diameter2.500 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 Diameter2.500 in.
Outlet PositionCenter
Outlet TypeSingle Center Outlet
Overall Length19.000 in.
Sound LevelAggressive
Tip Quantity0
TitleFlowmaster 942540 40 Delta Flow Muffler - 2.50 Center In / 2.50 Center Out - Aggressive Sound
WARNING CA Proposition 65No



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