can anyone suggest me a good lowering springs for my it-R, also need to know which exhaust pipe sound good on the it-R without making too much noise on the street. i want to keep a nice sound without having to put up the radio

 

um.. spoon lower springs are good. so are kg/mm.

as for exhaust... MUGEN for your application.

http://www.ipsracing.com for the lowering springs
http://www.kingmotorsports.com for the exhaust