BMW 540i
before: 2003 BMW 540i Exhaust Resonator Bypass, Regular $150 or Stainless $200
after: 2003 BMW 540i Exhaust Resonator Bypass, Regular $150 or Stainless $200
before: 2017 BMW 540i Exhaust Muffler Bypass W/ Y-Pipe, Regular $350 or Stainless $450
after: 2017 BMW 540i Exhaust Muffler Bypass W/ Y-Pipe, Regular $350 or Stainless $450
2017 BMW 540i Muffler Bypass W/ 3in Piping, Regular $500 or Stainless $600