So basically, i am going to do an APR Stage II upgrade from stock and i want to know whether or not i should have a boost guage installed as well. The people at the dealer that i talked to said that it was advisable, but not really 100% needed. I have a friend who has a modded tt Stage II with some other upgrades as well and he doesnt run with a boost guage (has had the mods for a few years now and no problems). So my question is, is it really that necessary?
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