[ QUOTE ] I've seen quite a few stainless manifolds for stock turbos(k04),these would require good bracing to avoid cracking with the weight of a heavy gt28rs.I might have seen a cast one in the states but i can't recollect where. So thats a new manifold,new turbo/kit,new downipe and flange,new oil and water lines,de-cat or sports cat.You would need a new intake hose as the inlet on a gt28rs is 3",adapted outlet/ic hose .Then you would need bigger injectors and have it would all mapped.It won't be that cheap. quote from site "This turbo happily makes a reliable 275 crank HP on pump gas and close to 300 crank HP on high octane "-k04 performance. I've read the other bit about how the stock manifold flows better than the atp manifold-hmmmm I predict big lag,time will tell. [/ QUOTE ] No its still not CHEAP, but cheaper than what it is at the moment. Intake can be adapted to fit the 28RS intake. Water and oil lines are cheap if you go to the right place, and injectors are not expensive either (£200 in the US for 440cc Bosch). Exhaust could stay, and then would be downpipe and cats. All in for under £4k i reckon if you can find a decent cast manifold... I wouldnt be too happy with a stainless manifold.