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
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Last edited by S54Dan; 01-10-2013 at 11:05 AM.