Honestly, in most cases, I wouldn't need to, but do you know what it feels like to see some crappy old TDI jetta go past you cuz you can't keep up top end??? My civic killlllllls it on acceleration, but it squeaks past cuz he's got a higher top end...
My bro's Integra is faster top end too.. He has a GSR, but my civic w/ b16a1 would beat it if it wasn't for the speed limiter.. He passed me at 140 and wasn't done accelerating... I was done at 125....