Just Dinan software will basically do nothing. You may see a +5hp/tq gain but that is about it. That's where Dinan gets you! You get hooked on everything and then pretty soon you have a whole S-package.

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Jeff
Current:
'07 Jeep Wrangler
'06 BMW X5 3.0i

Former:
'12 WRX; '08 WRX; '06 BMW X5 4.8is Dinan S1; '02 BMW 530i Dinan S2