Silverstone Metallic Insight with well over 200,000 miles on it. Bought for $300. Sold the IMA battery for $700 and got a bad battery in the deal. I temporarily fixed the bad battery by replacing one "stick" of cells, but now I have taken the IMA battery out.
Increased tire pressure to about 55/45 F/R PSI
Mobil 1 0w-16 Advanced Fuel Economy oil
Block heater
Lower grill block
LED bulbs
Warm air intake
Weight reduction
A/C delete (didn't work anyway)
IMA delete with Arduino
4 OEM donut wheels with 165/65-14 Insight tires
Electric power steering delete
Rear wiper delete
Planned Mods:
Kill switch
Full belly pan
Outside mirror(s) delete
More weight reduction
Boat tail?
Advanced camshaft and ignition timing
Honda Civic Hybrid transmission (maybe)
LED projector headlight conversion
Trailer hitch
ABS delete
Brake booster delete
Lighter 12v battery