ka24de t-pro headers and downpipe

[Indolent]

anyone try these?
i put some on my s13 ka24de, the t pro headers and downpipe (2.5)
got a gutted cat and 2.5 exhaust piping

car feels a little slower on the lower end, headers go 4-1 then 2.5 downpipe
is it jsut me or is it the header design?

[boroboros14]

If I am of the right thinking I believe that the 4-2-1 design is more for bottom end torque, wheras 4-1 is better for top-end horsepower. I am not completely positive though.

[Indolent]

yeah, seems right but i still wouldn't be too sure, anyone out there tell me how they're car felt after headers and what kind they used?