I run infinty kappa 6x8's in all corners. powered by a alpine amp off an alpine head unit. And i can personaly attest, the bass SUCKS!!! I also run a 12" infinty sub. and i run the xover on the headunit so the door speakers only get mid's and highs and then they sound good. but just the door speaker and no sub, the sound blows. 6x8 is just a crummy size for bass. So my advise would be to run 6x9's (if they do infact fit like everyone is stating) or run 6.5's(i have always had good luck/sounding with 6.5)

98 csvt t-red.. sho-shop intake, b&m, fidanza, spec1 clutch, Torsen, DMD,optimized Y& TB, Brullen, rear strut bar,h&r's,17" konig traffik's. "I say what I mean and I do what i say"