which cold air intake should I put in My 07 335I?
I have a 07 335I couple. It's totally stocked engine wise, I have the sports package with the step tronic system. I want to add a cold air intake, to get better gas millage or more hp,or both would be great! I'm also thinking about putting a chip to add more HP which do you think is the best for my money? Jucie box or PROcede v3? or is there something better?
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