Osiris uprev
Question: I'm finishing up bolt on mods on my g37s; about when would be appropriate for me to get a tune to prevent power loss? I only have z1 MAF silicone deletes, stillen gen 2 intakes, and a topspeed axle back exhaust...next up is the y-pipe, intake plenum, headers, and (preferably) HFC, but I'll go w/ TP, resonated or not...
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