As in the past, the civic and the teg( rsx) shared floor pans, as a result, anything that bolted to the floor pans( lower unibody) is interchangable.....but that does not mean the parts are the same. Everything on the dc5 is more geared toward performance than the ep3.
Suspension....
ft lca....same but the bushings are different( stiffer)
ft sway...same mounting locations but different stiffness and size
ft brakes.....ep3 02-03= the same as the em2, 04-05 ep3=same as the dc5 base
tie rod ends.....ep3= 15mm nut with 12mm balljoint shaft, dc5 =19mm nut with 15mm ball joint shaft.
ft struts and springs.....ep3 = lower rate springs, softer damping smaller hole for the tie rod end than all of the dc5's. Dc5 type s 05-06 had the springs wound in the oppiset direction, other spring will not fit them.
ft sub frame.....different part #'s so the are different.
r lca....different shock mounting gap, different bolt pattern on the trailing arm to the lca, different bushings.
r shock....different lower shock bushing size( dc5 is wider by 3mm), springs and damping are different.
r sway....different size and stiffness....see the swaybar thread in the suspension section.
motor
the ep3 k20a3 is not the same as the k20a3 in the base...for starters, the ep3 a3 has a balance shaft oil pump whle the dc5 base does not....cams are different, heck most of the part numbers do not match....so they are not the same motor.....but they can be swapped and the base motor will run off of the ep3 ecu as long as you change the intake manifold and tb.
for the total n00b's...the ep3 ecu will not run any combo of the k20a2/z1/z3 ....you want to run that, its kpro time.
how's that for a start?
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