So I have ARH 1 3/4 LT's to 3 in collectors and then the x pipe reduces down to 2.5 in to connect to my magnaflow catback. I love the sound of a oval magnaflows but they are to big and I am concerned they are now to close to where I have mounted my fuel lines and filer for my return setup. So i want to go with something smaller to keep the heat away from the filter. I dont want to hack up the catback so here are my choices that will require minimal modifications. Kooks race series, or spintech prostreets. I could also go with magnapacks but from the vids I have seen they dont do much for me.