From what I have heard AAtunign will be your best bet. ALSO, customer service there is supposedly kickass. They will probably even customize the stuff you need.
Team <span style='color:blue'>Perfect Line</span>
<span style='color:blue'>e46 M3 | e36 328i | e36 M3 | 04 Mini Cooper S | s14 240sx | FD RX-7 | 93 mr2t | 03 G35C | 04 RSX | 03 RSX | 2.2L s2000 | 05 Evo MR</span>
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