The most members online in one day was 407, 04-10-2012.
01bluesnake, 01Cobra, 01GTvert, 01Sleeper, 02SSEi, 03GTGreen, 03yellowstang, 04suprchrgd, 07sickss, 09rallybaltSS, 0GBlown, 10sec, 1998gpgt, 1FastWS6, 1quick98_gs, 1slowgreen50, 2002mustangGT, 2003_svtcobra, 32vMonte, 4DoorBlackTop, 79loserbluebu, 79vette, 94ta383, 95mustang_gt, 95SC, 99e-green, 99PONTIACGP, AIMIS08, Aircal, Alacran, AllGM, Angus, apflug3, Aron, ArtMajor15, ASAULTMECH, Atomicles, autospa2, b4black, Bad Merc, BADAZZTEALCOBRA, batman, bigshotsho93, BillyBru, Black and Orange, blakbearddelite, BlaqSnake, BlizzardTC, blmw, blowngp3, Bones, Boomba Racing, BoostD00GaGt, boostedguy05, boredatwork, breeze, BrianG, Bru, Bubbles, BUCKWHEAT, budsang1, bugsyc, Buickultra, Bullhorn, BullyRauder, Burtonrider10022, C.Evans, cacicgtp7, camaro1982, CDgtp, cdh027, Charlie_Boy7, chris101, Chrisco, chrisk, clint282cc, cobravenom39, cobra_spence, cougar9150, CrawlinTBSS, cruzC5FRC, CTC DEEZUL, D, Dan00Hawk, Darius, Dark C6, DarkShadow, Dasfinc, DaSnoBordr, Dawg, Detour, devious_ceta, Diavolo, doug06c6, Dragon03, Dropkickmolly13, droz, DTUB, E, Eagle, EmersonHart13, emotart, Euro, Fast99Snake, FastKatt, Fastronald, Fat tony157, firemandan1700, Fish, FLSHBCK, FlyinGTP, Flyn High Again, FNFAST, Foques, Formula_LS1, foureverwise, FourFiftyFour, framos242, FrankCVPI, Freebeer187, frosty23_45, G00n, Gav'sPurpleZ, GearsForYourRears, GLADIATOR, GLIKENNY, gnxs, GOON, GraFFix, greasy, GrnZ, GT5.0FACE, gtr4lif3, GTwolf, guspech750, Gypsy, G_T_P, Havoc, hellraiser319, HILROD, HONEST ABE, hoofnit1, Hubbard 0, HYPERformance, IceCreamAssassin, IDAFC21, ILikeIt, ilikemtb999, imbuggin, imp0rted1, Intel, ITL Cobra, ITSQUIK, Jakeman17, jason05gt, jbigalow, JeremyCliff, Jokerzl, K J, K0R3AN, KAR, kdubs, Killer_GTP, Koebot, kp116, Krash7051, ktraver97ss, kyles91rs, Larry@AMS, ldyzluvdis06, lukasxpl, Luke M, Makdaddy, Malakaone, Maniak, Marble_Sharp, massacre, mat0485, Mike Kopstain, MikeyLikesIt, Miss Esa, mod800, monte2003ss, Mook, Mr Baytchos, MrCarreraGTO, MrDragster1970, Mr_Roboto, musclemerc, muskie, Myprixxx, m_dogg, NATEHAWKMM, Neuby77, nick122590, nickl16, Nightrunner, Nine Lives Johnny, NITEMARE T/A, oakleafresin, OhMyGS, onecobra2fear, Outlaw, PaceCarBoozer, pajamasam, PANDA, paulbuiltbird, pbdevastator, Pewter-Camaro, pewterz55, Phillip Forumballs, PhoenixTA, Pillion88, PokerBlakeB, PonyUp, popskull, Pressure Ratio, Prevent, ProjectGTP, ProRauder, pw_cc_runner, qwik01cobra, QwkBalt, RacerX, Racerx66, radioguy6, raresvt, raygtps, RCautoworks, Rebel, red04regencyrst, redevo58, RICH17, rocket5979, rocket69GTP, RossiGTP, Runtz52, rz79, sallen85, SaturdaysGS, SauceBoss, SBTerminator, SC Cheesehead, scca_stang, ScottyB, Shadow99, Shells_04, Shibby50, ShlomoMoskowitz, Shocker, sickmint79, Siege, silver86, Silverback, sinisterc6, SirMarco, skeezer, sleepercobra, SleeperLS, SloLane, Slow Chevy, slow4.6, slowcobalt, smith876, Smokinhot, smoothblue, smug, SnailblazerSS, SonicBlues92, SonicBlur, Soulonfire11, SpdKilz, Speed, Spicy McHaggiz, spidamanSS, splytsecond, Sprayin, SRT41320, ss454, steve r, Stink Star Productions, Stock LS, stock-t-bird, Stoked Graphics, stosaros, StrobinSS, SuperDaveGSE, svtcobra725, svtlightning00, Swoley McDelts, syP, TBone, teamstorm02, Teege24, Terminator-Fox, The Beast, The Chin, The Italian, Theautoguy, TheRedThing, ThirdgenTa, tin, tinfoilhat, TommyGloves, tony275, TonzKnock-G, TransHed, transmaxed, tru88, True Blue 2294, Turbocharged400sbc, turbomonkey25, TurboTJ, Turk, Turtle, turtleman, TwistedSoundCo, Typhoon, udluuz, united2512002, UWISHU1, v6z24e, v8venomgt, VenomInside, VENOMOUS98, VenomousDSG, Vogz, vroom, Wessel, whit2285, WhiteMach03, willizm, willsmysticcobra, wlbandy, wolfe, wolfes_dsm, Wolfman, WOLVERINE, wombat, xringshooter7, yaritez28, yjmud, YoushallgoFo, Zack, zenriddles, ZXMustang

Billy Cobra