when do i need to upgrade my tune?
as my next mod, i'd like to do something along the lines of longtube headers, cat deletes, x pipes, resonator deletes.
not exactly all of them at the same time but i'm trying to weigh my options
at what point would i need to get an upgraded tune. and if i need one, will it be a problem to bring my tune to a stage 2. or do i need to find a stage 2 tune from somewhere depending on the parts i get?
if i'm mixing and matching parts from here and there, wouldn't it be difficult to tune the ecu to the specs of the parts?
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