Flowmaster Super 40 Series Muffler 3.50" In/Out Offset LY22471 great upgrade for stock cam

great upgrade for stock cam in fuel injected applications

and fuel-specific lines

and 4909 dial indicator

Original 6 bolt pattern

Forward or Reverse Shift Pattern Compatible

Flowmaster Super 40 Series Muffler 3.50" In/Out Offset LY22471 great upgrade for stock camFlowmaster introduces their new Super 40 Series muffler intended for late model pickup trucks with 3. 5in OEM tubing size. This muffler features a 3. 5in offset inlet offset outlet configuration with larger 4. 0in internals for maximum flow capabilities with the larger engine sizes found in today?? s trucks. Being a Super 40 design, this muffler will deliver a deep, aggressive sound outside and inside the vehicle. Fully welded with 409S Stainless