My son is sponsored by Mazda as an autocross racer. He arranged a deal the got me a 2006 Mazda3 for $15800.......... I drove it home today.... It was the touring version. I really like it.


So, What new mods should I launch to increase gas milage... power, handling etc.?

 

All the usual. Intake, exhaust, lowering, sway bars.

 

Cold air Intake-K&N or Injen
Exhaust-Magnaflow
Lowering springs-TEIN
Swaybars-Razzi
Coilovers-D2
ShortShifter-TWM
Brakelines-Wilwood
Brakepads-HAWK

Thats all i got

 

just browse the mazda3 threads here. im sure youll find what youre looking for.

 

You guys are kidding me right? Exhaust, Short shifter, will improve mileage? Well probably, not from my experience. Think straight here, More power Better Mileage?? sounds somewhat wrong to me. Exhaust will only give a good sound, 1-2 hp gain, Intake max 3-7 hp. Lowering, sway, strut and tie bars, will improve the handling and and very good for aerodynamics. Less negative force, better aerodynamic, less gas used, better mileage. On the other hand, short shifter should work too, but i do not know, the faster you shift at lower RPM's better mileage you will get.
BUT, i have to agree with Power and Handling; Injen intake, Lowering, Sway, Motor oil and filter, Exhaust, Lighter wheels and lower profile rubber (good for handling and improve hp at your wheels), Get rid of all the plastic covers under the hood, and if you wanna do some wight reduction upgrade, remove, everything from your trunk (spare tire, jumper cables, jack, rear seat head rests, floor mats, and so on whatever you find no need to carry in your car). Hope i somewhat helped.