BMW M3 Competition Valvetronic Designs.

Installed @Valvetronicdesign. Resonator delete. This would be part one. Anyways this system has the same Pop and Crack 🔥🔥 that the R8 GT system had. Took about an hour to install for a technician with basic hand tools. One tool that is need that some technician may not have is an exhaust pipe cutter. Just a head up is you install this kit. Ultimate Performance , Albuquerque New Mexico 3536 Girard Blvd N.E.