Yes, the EG and DC share the same chassis. All suspension parts are interchangeable. However, in order to use DC2R rear struts on an EG, you need the DC2R rear LCAs. JDM EG6 rear LCAs are similar to...
Yes, our USDM EM1 did come with a 26mm front and 13mm rear. In the link I posted above, it shows installation of our EM1 26mm bar which is exactly the same as the EK9 bar/lcas.
The top diagram is from the USDM 99-00 Civic Si EM1. The lower diagram is from the USDM 96-00 Civic EX EJ8. Since the EK4 would be closely related to the EM1 as terms as engine and other...
I had Skunk2 sleeved coilovers and the ride is stiffer, but bearable. What is your suspension and driving plans? The S2 sleeves are good for daily driving.
This is the 26mm front sway, correct? You will also need the front strut forks from the EK9 or EM1. The EK9/EM1 front LCAs are of different design and you need the strut forks along with it.