i think the xs is what you pay for , dont get me wrong i dont believe in paying over the odds for branded items but they cant sell them cheap without skimping on materials cores ect and like i said earlier bu the time you have paid out on bits to get it fitted right fucked around getting it to fit you might aswell get one of thos rapidford radtec ones at least it fits and theres few already runing them on big hp with no probs . A bigger cooler is my next thing and i was tempted to go for the xs but id rather fit something right for the car and been tested on all sorts of cossies ! spend enough time fixin the twat without buyin bits you have to make fit