hi just would like to know how much is the average cost to tune a sapphire cosworth.

If i can get good enough money for my s1 after summer...the next step up would be a sapphire cosworth...4x4 is what i really would like.

so say if i come along a saph that is standard except for exhaust...air filter...what would be the general cost for a 330 bhp upgrade??

now i dont mean the cheapest i mean a good quality RELIABLE upgrade..so headgasket and fuel pump..(if needed) and how much should i expect to pay for a good map??