nah iv only got stage 1, i plan to upgrade to stage 2 once iv got my DP and an FMIC
u could run a DP and race cat (200cell) with ya current remap no
problem and it would pass an mot ok, assuming uv got an aftermarket cat back system already
if u did decide to join the group buy for a milltek downpipe and cat ud be fine for mot, and u'd be saving a bundle over the regular price for a milltek DP,
obviously u could just go for different brand to milltek though and might be cheaper again