shotime22
New Member
Hello everyone, I just got a 2015 sho pp and wanted to know what were the best mods to start with. I've been on YouTube day and night Ave have seen the GH power package, a CAI or drop in, and downpipes were a common thing to make good power, is this reasonably true for most on here?? Also I wanted to know if I did the GH power package w 3 bar, thermostat, spark plugs and tune first would I have to re-tune the car when I get the downpipe and exhaust???