I think you will find that they will be all very similar in the power making ability, I like the look of them all, and they are all just open plenums, the runers are still standed ones on the bottem part. you will not have made a wrong decision which ever one you go to. I just have to say this, as I have been asked, why the process west one made so much of a jump when put on the old C&V car, (100rkws) well all I can say is that same car made 360rwks 4 years ago, with out a plenum, (if it had a the trial aps plenum on it at this time I am sorry, but still shows they are all around the same)and without even a edit, but with a aps intercooler, (stage 3) and 385kws with gutted cat and race fuel, (and ran a ten like this) so I beleive what this shows is they all make good power, and you should go with the one you like the best, they will all perform well. David