If you are just doing simple mods, all you have to do is put the stock stuff back before taking it to the dealers. Its simple enough to put your old intakes, or springs back on. If you have a engine problem, they can't void your engine warranty because you had mod springs installed.
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2003 Skyline 350GT--Tein Suspension, NRG Strut bar, Nismo CAI w/bypass, JDM emblems, Nismo Graphics...
2009 Nismo Z34 #389-- Clear Bra
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