Hello Macsic, both the 4350 and 4355 are listed at 8 ohms due to the 2202 mid bass driver. Above that driver the impedance runs around 10 to 12 ohms. The 4350 crossover is set at 9 KHz and is a 3 pole 18/db and the 4355 is suppose to be at 10 KHz and a 3 pole also. The JBL factory never made a 2441 in 8 ohms but did on the 2450’s. If the C16R2441 kit is used in the 2450 you would be fine with the 3155 crossover.
If you use the 3107 crossover used in the 4350’s you will have some comb filtering effect as the 2441 diaphragm will run up into the 2405 frequency range and over lap. Hope this helps