This weekend I ran an 81.972... Oh, that's for auto cross by the way, hehe. Not too shabby for it being my first time out doing that, avarage for my class was between 72 and 75 seconds, so 6 off from that isn't too bad for a novice. Can't say I have times in the ¼ yet for my car, soon though just for shits and giggles. But you did ask for times, not specifying what for.
Anyways, engine mods, all I have is short ram intake, and A'pexi World Sport exhaust. Not sure on my HP for that, but I'm guessing I've gained maybe about 7hp max from those mods. No headers yet, the exhaust isn't as efficient as it could be. suspension wise (for the kind of racing I do, since I find drag kinda boring) I'm lowered on Tein SS shocks/springs, have a Neuspeed upper strut bar, some generic lower rear tiebar, and an OEM Civic Si rear swaybar, all rolling on a set of Rota Circuit 8 wheels (11.9lbs per rim!) wrapped by Kumho Ecsta 711 tires.