thanks for the quick reply I was a bit worried, so I wont scrape it off! and yes I should of said what is on the fin not what is this lol I did notice the inside of my crossover is all peeled and down to metal so on goes a new intake pipe for the turbo, might even block up the bov and get some dose. is any body strongly against the filter sitting in a warm spot of the engine bay? it is getting intercooled anyway... ive searched but mixed opinions everywhere?