All HKS systems have those on top of the muffler... I'm not sure of the idea behind them but common with HKS systems...
I would put that decal on your toolbox in your garage haha... Leave the car nice and clean!
Exhaust is tits btw... burnt ti tips looks great on the blue
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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)
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