ECS is by far not the worst there is but I have had on multiple occasions the wrong part shipped or a part shipped late or not at all until I called. Every time the issue was remedied immediately with overnight shipping but its still a bit of a pain. Never had an issue with their warranty service. All that said I try to stick to FCP and AZAutohaus because neither have EVER screwed anything up for me. I constantly maintain 4 Bimmers and a classic Benz so I buy a LOT of parts.

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Again Daily Driven SC'd 4.6iS, whats the point of having a sweet ride if you dont use it all the time.