My girlfriends car, (a 2001 pontiac sunfire) has been having alot of problems with her cluster gauge.
While she is driving the speedometer and thermostat and gas gauges all drop down like the car got shut off. Then will all go back on all at the same time. also all the dash lights go on and...
What do you mean by "better"?
Faster? Cooler?
cold air intake. k&n filter
exhaust system
with high flow cadillac conv. (or none at all depending on if you gotta pass emissions)
header.
Better spark plugs wont do anything unless you have a turbocharger or serious power adders. (either will spark...