Any aero stuff you do on your car is only effective WELL above 80-90 mph.
For most,its just a styling option.
On venting your engine,what is the purpose?
You plan on doing heavy tracking?
IMO,if the plan is improved response,slap on some HFC's with the stock intake.
Drop in some K&N"S.
To personalize your Z exterior, cover the B-pillars with carbon fiber.
ZCF has e'm on Ebay for 90 bucks a set,shipped.
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