yep. t5's would be my choice, i have had cpi's, t5's and t6's, 2 into1 pipes, and the t5 is my favorite.. have you tried using a different needle in that single carb? try a eek or a dek needle, will make a ton of difference, i had to buy a new boot today from trinity for my 2 into 1.. was 50 bucks,, sucks ass