OEM Mitsubishi balance shaft belt. Fits all 2003-2007 Mitsubishi Lancer Evolution 8 and 9.
The balance shaft belt tensioner is another critical timing part. Replace it every time you replace the balance shaft. Fits all turbo 1995-1999 DSM (Eclipse/Talon) cars.
It is pretty common for the rubber to deteriorate on OEM crank pulleys after 5 years or so. What happens when it finally lets go is suddenly the engine isn't...