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Hello everyone, I'm new to the tread n was wondering if it was possible to have my car tuned without a piggyback or access port from Cobb, I drive an 05 wrx n have mods of full catless exhaust from up pipe strait back, aps cold air intake and dual vent aps b.o.v, think I'm running a little lean judging by the aem uego guage readings between 14:6-15:9 some times even 13:9-15:9, if any one can help please let me know thanks