R-1 parts?

ok i just got the hook up and it's for all R-1 racing parts.......
i was wondering is there stuff is any good......the things i'm thinkin of getting are......(keep in mind the prices are not retail there what the dealer is getting them for)

r-1 catback $235

2pc ceramic Headder $35...lol i know.....it's a prototype i'm gonna test it...i'm paying just s&h for it...but R-1 is making it for the guy i'm getting it from

all 4 strut bars $60

CAI with intercooler $100

seats $350

Spec-6 17" rims $115 a piece


so are they good prices and are the parts worth what i'm gonna pay.......and if anyone is interested in some stuff PM me and i can hook you up