You will need a tune. My ECU started throwing lean codes from the upper sensors when I put them on. The tune corrected the AFRs, no more codes.
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Competition Clutch|Fast Intentions|Maxbore|NST|Setrab|Stillen|Tomei|Uprev| Z1
Avant Garde|SPC|Stance|Whiteline
Aerojacket|Seibon|Tanabe|TRS|TWM
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