To tell you the true, this is the first time I have heard this and I had over 20 cars modified.
My thought was because the F.I. is a custom exhaust, not a mass produce one and that was the reason...but it makes sense!
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2009 370Z MB Base w/Sport Package 6MT
Modshack's Custom Air Intakes /3M Clear Bra/ Illuminated Kick Plates / F. I CBE w/12" resonators / EVO-R Front Lip / Rear Hatch Wing / Tein S-Tech Springs /Ilegal Tint in the Rep. of VA/4x20mm Z1 Spacers/ Vinyl Roof/ Liquid Carbon Designs
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