Cobb's: 24" x 3.5" x 7.9 (I'm assuming this is NOT including the endtanks.
Exhaust Depot- 22 x 3 x9 (28x3x9 including endtanks)
CP-E- 20”x6”x3”
corksport- 24 in x 6 in x 3.6 in,
I think theyre all not including the endtanks, so add 6 or so inches to each to allow room for the endtanks.
Couldnt really find the size for atps, turboxs, or begi core dimensions, turboxs is bigger, and atp and begi's are both smaller.