What are some relatively cheap and DYI performance mods for the H3?

 

Ambeint air Intake - helps engine breath better... Did for less than 70
New exhaust system - get rid of oem system with cat. converters
PCMfor less - Upgrade tuning, and shift points etc.... less than 200
cheapest, quickest I can think of right off the cuff.

 

theres a post for "free air flo", a no cost , and so far unproven air flo smoothing method im trying.
with crappy weather i cant really road test . i just want to see mpg increase on trips.