Brands (M)
- Mackay
- Magnafilter
- Magnaflow
- Magneti marelli
- Mah
- Mahle
- Mallory
- Manik
- Mann
- Mann-filter
- Mapco
- Mark automotive
- Marnal
- Mats4less
- Mav
- Maval
- Mbl
- Mbrp
- Mean green
- Mechanix wear
- Mes
- Metro molded
- Mevotech
- Mey
- Meyle
- Mickey thompson
- Mile marker
- Mission trading company
- Mk
- Monroe
- Moog
- Moose racing
- Motive gear
- Motorcraft
- Mountain
- Mr gasket
- Msd
- Msr racing
- Mtc
- Muth