My car is a 2006 Mazda 3 sedan.  The Tripoint Engineering turbo kit was just the beginning...  

my car's thread on ap-auto.com (pics!)

Performance Modifications:

*Tripoint Engineering Turbo kit
*Garrett GT2871R turbo
*AEM Fuel Ignition Controller
*3" downpipe-back custom catless exhaust with Blitz nur-spec can (gives it a mean deep rumble)
*ACT Heavy duty performance clutch kit
*Eagle rods and Wiseco coated pistons, polished and balanced crank, block decked--rebuilt bottom end
*ARP head and main studs
*NGK iridium spark plugs
*Synapse BOV run recirculated
*Greddy Profec B Spec II electronic boost controller (11 and 17 PSI settings)
*Megan Racing coilovers
*GT Spec front strut tower bar
*Greddy oil catch can
*Spin on oil filter conversion with sandwich plate
*AWR rear engine mount
*upgraded Mazda passenger side engine mount (OEM one was destroyed)
*Earl's oil cooler front mount set-up
*Eibach camber kit
*Apexi turbo timer


Interior Modifications:

*CP-e center dash gage pod
*Autometer Cobalt wideband air:fuel, oil temp, and boost gages
*Kenwood DDX812 double din w/10" RE sub in custom box in the trunk
*TWM Performance short throw shifter with knob and boot


Exterior Modifications:

*225/40/18 Kwoyo rims & Lexani tires
*shorty antenna (got rid of the horsewhip)
*redline tuning hood lifts
*that's all so far...I'm more concerned with going fast than looking fast