“Upgraded” to Bilstein 4600s with 99’ springs not too long ago and they’re way too rough. You can feel just about every bump in the road and it’s extremely jarring and uncomfortable.
Note 5100s are not soak up the bumps kind of shocks. Depending on what you think is atrocious about your current ride, it might not be an improvement. My 08 V8 feels stiffer/sharper on bumps compared to OEM shocks, though it handles them with better composure, less resonance/vibration on hard hits, and handles washboard and bumps better. Also less body roll.
Actually, it rides worse cause I went with Bilstein B6
This may not be super helpful, as Idk if there is a significant difference in how these shocks play due to the V8 suspension geometry and weight, but b8's on intrax springs on my m5 are just about perfect for a daily driver in my experience. My understanding is that the b6 is valved exactly the same as the b8 but has a different shaft length meant for use with standard/non-lowering springs.
I have Bilstein B8 Performance shock absorbers with Eibach EW 2067001VA springs; on a sedan 2002 530i manual transmission.
Great ride on a perfectly smooth road and stable on the highway at high speeds.
Horrible where I live.
To be honest, I kinda regret installing them.
Don’t get the cheapest- Brands like KYB and Monroe are ones to consider. Bilstein if you’re feeling fancy and want to spend the extra.
Do not go OEM. At a minimum, put on Bilstein 5100 shocks at stock height and improve ride and lessen nose dive on braking. I got a set of 4 last year for my son's 1999 3rd gen and paid $300 for install $400 for parts. We used the stock 99 tall springs. I put 5100 shocks on my 2011 and lifted the front 2" and put trd springs on the back to level. Way better off road and firmer on road.
I had a 2018 Z71 and went with the Rancho RS 9000XL Quicklift. Was a great setup. I now have a 2020 AT4 and put on a set of the Bilstein 5100’s. Don’t like them at all. Ride quality is not much better than the factory and I still have the rear end hop going over bumps at speed.
5100s all 4 corners, top lift setting in front with 1" taller rear block on my 2008. No, not jarring. Firm in the sense that the weight of the truck is well controlled, but still comfortable. In no way is it harsh.
I put the 5100 on my 15 Terrain, I don't like them much. I am mostly hwy driving. They're so stiff, you can feel every crack in the road. The nose dive at corners is gone, but very stiff.
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