Shock absorbers Bilstein or KYB

Yes, you can use OEM springs with the Bilstein B6. I have them on my MS3 and the ride feels much more planted compared to the stock shocks / struts.

For shocks themselves I went with Bilstein B4, also at 120kish and also for no reason as my stock shocks were fine, but they are also problem free at 155k

Having done my own suspension install a couple years back switching from stock to Bilstein B8s / Nuespeed springs, while the cost does seem high, the fronts are a royal pain in the ass to DIY so there is a part of me that thinks it's worth it to have someone tackle the front for their expertise/tools and speed to complete w/o a million swear words from your end.

I like my Bilstein 5100 on the back on my 2012 Sequoia sr5 4x4. 4600 are good as well. Can't go wrong with either. I like the Bilstein, I have not tried the others though.

if you're going this route, **** the stock struts/shocks, the Alltrack specific b6 is similar parts price and so much better

I just lowered my wife's car (per her request) on H&R springs with new kyb shocks. It rides a bit stiffer (as expected) but no issues with rubbing or alignment. The turn-in response is greatly improved as well as body roll reduction.

I also noticed that the Bilstein B6 are not much more than the B4 on Rock Auto, given that you are driving a Boxster, handling is probably a top priority, why not use the chance to also get an upgrade?

Despite the fact that I had to pour quite a bit of $ into bringing ours up to an OK state (Bilstein shocks, new rims, brakes, battery and alternator) it always puts a smile on my face and makes me want to drive it more.

I've used those on several other cars and they're a solid "fine". They work, and they're not bad. Just don't expect them to be amazing.

Two years ago,I bought kyb left (usa)and right(china). Kyb right side made in china leak in a week and they send new made usa but have pay return shipping fee.