What is the difference between the 02-04 and 05-06 RSX

[DeetrixDc5]

the only real difference from the k20a2(02-04) and the k20z1(05-06) is that the z1 has the itr cams(type r) so when u tune it u get alot more power.

 

[dc2GS-R]

Go map them out with a micrometer, they are not the same. They are the same from a tuners standpoint because the difference is so tiny it really doesn't make a difference. But they are slightly different, hence the different part numbers

 

[weilyan]

In terms of visual:
different front bumper with different headlights
different rear bumpber with different taillights
different cluster
different oem leather seats and i believe the stock sound system has been improved as well.