Really don't know if there is an upgraded head gasket may be a thicker one ? as far as that and the timing cover gasket goes any GM dealer should carry them or be able to get them .Nalley Buick GMC and GM Parts Direct are two vendors that carry them be sure to have your vin # handy when you call so they can look up the correct part #s ,as for the ARP head studs Summit Racing is probably the best place as far as price goes .For the turbo I would contact DDM Works or Werks Performance two of our vendors that specialize in Kappas a bunch of good info from either one . Good Luck !
WooHoo!!! Ordered a loaded Deep GXP on March 19th, 2008. Order number 0814D93708
Event code 3400 on April 12, 2008
Born April 30, 2008
Delivered to dealer May 23th, 2008
Delivered on May 27, 2008
Mods: lose the chicklets, VentureShield, Dual horns, AfterShock spoiler, Weathershield cover, Lil Chromies, Red calipers with black Solstice stickers, Opel GT antenna and Solo GXP-RCD exhaust with Solo hi-flow cat!
performance autowerks claims to have an "upgraded" headgasket for $150... it's the stock gasket ($50 or so) with a spray on sealer, i wouldn't spend the money on it, i got burned twice, don't make my mistake...