Chevy 5.3 vs Ford 4.6 Flows & no cats
Comparing my 2002 Mustang GT with my dad's 2004 Silverado z71. Mustang has Flowmaster Super 44s and a BBK off-road X pipe. Chevy has a Flowmaster Original 40 series with a custom off-road Y pipe. Catalytic converters have been removed on both vehicles :)