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Review on Efficient Performance with Flowmaster 425404 2.50 In(D)/Out(D) 40 Series Muffler by Seth Damain

Revainrating 5 out of 5

sounds amazing. The truck is now spinning the wheels through second gear

I ordered it and received it in two days I took the saw to my factory 2015 Tundra SR 4x4 5.7. Place these on two tubes and center them on the tubes using makeshift spacers and weld. Used at the factory after the muffler hanger has been welded to the Flowmaster's dual outlets and everything has been properly hung and welded. Sounds amazing. The truck is now turning its wheels in second gear!

Pros
  • Muffler
Cons
  • Hard to tell