I push the car pretty hard in the corners so I wanted stiffer spring rates. I could have lived with the Greddy/KW but I love Swift so it was partially an emotional decision too. I have driven another member's BC BR Swift 16/12 and I wanted to order 16/12 but the 16 rate springs were very backordered, like 8+ weeks I was told. Thus 18/14 was suggested and I figured why not try the better dampening on the DS series to offset the stiffer springs. Low speed and bumps are actually more comfortable in the BC DS Swift 18/14 than the BC BR Swift 16/12 . I have BC BR Swift 14/12 on my IS350 and the ISF BC DS Swift 18/14 rides more comfortable.

 

I can say the kw x greddy suspension is fantastic over stock. I have an '11 and it drives its quite the upgrade, nice a smooth and like the above, I'm low as well.

 

I agree it is an improvement over stock!