ECS tuning is cheaper because the part is not OE
PS: E46 M3 always use mechnical AC tensioner. It's only the Non-m that it changes
2005 M3 6MT | Weekend toy & Track rat
2003 330i ZHP 6MT | Wife Mobile
1994 325i 5MT | DD
Last edited by S54Dan; 01-10-2013 at 12:05 PM.