4-2-1 headers, what brand is good at reasonable price??

[TODA AU]

i been readin this thread all the way from page one, and im also trying to find the best headers to cat back system setup for an EK4, at the moment, i like the idea of Toda headers and cat with a mugen catback exhaust .. and sorry for being noob, but is it possible to fit Mugen B16B (ek9) parts as in the air intake, headers, exhaust cat etc, into the B16A ek4? without having to modify the parts themselves ? because if i can, i would like to have mugen from air intake, headers, all the way to exhaust.

Yes,
The only issue (small as it may be) will be that the headers will be 7mm lower than usual.
Every part will fit, no problem.