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I am looking to order H&R sport spring part 51858 for my CL-S 6spd but everywhere I look online does not list the CL as compatible with it. Does anyone know for sure if this is the correct part number for our cars? Also, I noticed the part number 51858 shows a -xx after it. Would anyone know two digits after the dash?

Also, I am going to be replacing the struts/shocks with Bilstein's. Does anyone have any recommendations on which ones to get or whether I should go with a different company?

Lastly, I'm obviously new to all this but am having the install done at a shop. Since I'm the one ordering the parts is there any additional items I need? Eg. the strut covers or whatever they're called? Any thing to go with the springs etc..?

Thanks very much!

-Acura CL Type S 6spd with Navi
-90,000 miles