What's your favorite mod you've done for under $250?

Full tank fuel ?

dunno if already said but short throw dipstick for sure

ITBS

WEIGHT reduction

Spyder Headlights for sure.

Upgraded antiroll bars and bushings. 100 eur all in all.

A front end change with new wheels plus bigger brakes all round and a fresh coat of paint for €260

getting rid of the orange blinkers and reflectors on my mx5 :D

Oil, filters and good used tires.

2 winter tires for my FWD car :p