I wouldn't send that back as it's a 3port rspec sleave and it's probably my choice over the 7 port at the mo with the right pipe combo- 2047 with the shortest header you can get your hands on it will have more bottom end be smoother and have almost if not as much top end just my thoughts

Also Grizz1,
nice to hear you happy with the new tune, there is probably more we could get out of them just didn't wan't to make them too insane for you just yet
happy to help anytime

Adrian