If its a genuine one, specced for a car and not a diesel truck, and in the UK its very cheap compared to UK prices.

My friend Lee and also the bloke whos doing my engine bought 2 at 550quid each inc delivery from America and they were the large compressor 1000bhp versions rather than the smaller 800bhp versions.

Most places in the US still charge about 1k in our money for em, shitloads more in this ripoff country.

Way too big for anything under about 2.5litres tho