BMW M5 Forum and M6 Forums banner

ues

  1. Headers Aftermarket or Gutted stock ones

    E60 M5 and E61 M5 Touring Discussion
    I was wondering if there is a big difference with running some after market headers or gutting the stock ones and deleting the primary cats. My question is....anyone running stock headers that are gutted and deleting the primary cats? Thanks for the info in advance
Top