hi guys, recommended engine oil for honda city facelift version vtec 2006?

hi guys im new here, my friend is driving honda city 2006 (tail lamp is slightly different), he wanna change sport spring and stabilizer bar.

any recommend for sport spring and rougly how much it cost?

same to stabilizer bar, ultra racing? how much if comes with set, and how many bars can be installed on this ride. and finally rougly how much it cost?

he wanna mod all this because he feel that his car is sampan, he opt for better handling and cornering.

appreaciate ur replies!

EDIT: is monza sport spring good? i saw someone selling for rm350.