Ehhhhrrrr WRONG! If you want to really push your car and learn it's behavior, you take it to the track, drag strip, closed road, etc... This way you could properly document how each mod effects your car in which way. It's both fun and safe
I can't believe a grown ass man just posted this ignorant type of a reply! You sound like a teenager that just got his first car and thinks it's all fun and games until something serious happens. FYI Whether it's busy or non-busy highway it's still a public road. You do not have any sort of a control over what other drivers do on the road. God Forbid, but it only takes one person to switch a lane without using turn signal and looking and smash right into you when you're speeding and passing them on the right or left. Endangering other drivers on public roads with that type of a behavior has no excuse. Stop before your luck runs out, you're not impressing anyone here with that type of driving nor does it express any credibility to the mods you performed.