I'm sorry, but you'll look like an ass. It's always a laugh when people show up to the track with seats ripped out, a stock seat for the driver and your getting whooped on by Miatas.
If you're talking about a drag strip, then hell yea, do it!
KW V3's, Sparco Pro2000's, Vorshlag CP's, JB4, Heat Wrapped Raceland DP's, aFe stg. 2 Sealed Intake, Miro 111's, Hankook RS3's 225/245 (for now), Seibon M3 CF Hood, Turner Motorsports Alum. Radiator, Big Tom IC, BMW Performance bumper.