I've got a 3" sports-cat downpipe that I plan to fit to my 2.5" exhaust system. I've found two possible adaptors, one made by Mishimoto and the other by Grimmspeed.

Can anyone advise if either one of these is known to be better than the other, or are they both as similar as they look!?

Also, does anyone know of anywhere I can get one for less than the ridiculously steep (IMO) price of £45 they both seem to cost in the UK!?

 

Silly price for what is just a flange with a piece of 2.5" pipe welded to it.
Buy a flange,piece of pipe and weld your own,or am sure any exhaust shop will be able to make you one for a lot cheaper?