Stock XI springs vs Eibach or HR

chris55552 · Yesterday, 12:21 PM

Ive recently overhauled my suspension, replaced struts and shocks with koni active, tires replaced with pilot sport 4 all seasons (love those)....The ride has improved drastically but I feel like I should have changed springs instead of reusing the stock xi springs. To all the more experienced minds than mine, how big of a difference do say eibach springs make vs the stock xi springs. Im trying to get just a little smoother ride, can someone suggest a good spring? Im not sure if eibach or HR or any other would be best. Or if any other suspension upgrade would help, by all means tell me what you think. Thanks a ton in advance.

sparkyte · Today, 08:20 AM

335xi here i started the other way round with first changing the springs to Eibach PRO KIT and i am yet to change other parts on the suspension. Definitely a great improvement in stability and car feels way sportier but there is a known issue with sport springs/stock shocks and the suspension bottoms out a lot more especially on big bumps it feels really rough from the inside as if a wheel fell off. Maybe you will be fine with this now that you have koni shocks/i think i read it fixes this issue/. Apart from this all good and car feels amazing at speed and taking corners/predictive not like before/. For a tuned 335xi 400+hp the stock springs are not good you are constantly going up/on acceleration/ and down/ on braking/ and car felt floaty. I don't have experience with the H&R springs though. Car sits a little lower too. You should change the springs as well.

whyzee125 · Today, 09:55 AM

If you're wanting the smoothest ride quality, I think the stock springs are the best choice. This platform doesn't have a ton of bump travel to work with, so reducing that further will increase the amount of bottoming out you do (unless you increase spring rate which most perceive to be less comfortable).

If you're looking for a more planted feel in exchange for a little smoothness, then afermarket springs can get you there. I'm not as familiar with the xi's, but I know on the rwd's, Eibachs are a mixed bag because they are lower but not stiffer than stock leading some to hit the bump stops more often than they'd like.

Yesterday, 12:21 PM	#1
chris55552 Private First Class 85 Rep 180 Posts Drives: 2017 BMW x3 35i 2012 E92 328XI Join Date: Jul 2023 Location: alexandra LA iTrader: (0)	Stock XI springs vs Eibach or HR Ive recently overhauled my suspension, replaced struts and shocks with koni active, tires replaced with pilot sport 4 all seasons (love those)....The ride has improved drastically but I feel like I should have changed springs instead of reusing the stock xi springs. To all the more experienced minds than mine, how big of a difference do say eibach springs make vs the stock xi springs. Im trying to get just a little smoother ride, can someone suggest a good spring? Im not sure if eibach or HR or any other would be best. Or if any other suspension upgrade would help, by all means tell me what you think. Thanks a ton in advance.
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Today, 08:20 AM	#2
sparkyte New Member 11 Rep 12 Posts Drives: BMW E91 335 XI Join Date: Jun 2024 Location: BULGARIA iTrader: (0)	335xi here i started the other way round with first changing the springs to Eibach PRO KIT and i am yet to change other parts on the suspension. Definitely a great improvement in stability and car feels way sportier but there is a known issue with sport springs/stock shocks and the suspension bottoms out a lot more especially on big bumps it feels really rough from the inside as if a wheel fell off. Maybe you will be fine with this now that you have koni shocks/i think i read it fixes this issue/. Apart from this all good and car feels amazing at speed and taking corners/predictive not like before/. For a tuned 335xi 400+hp the stock springs are not good you are constantly going up/on acceleration/ and down/ on braking/ and car felt floaty. I don't have experience with the H&R springs though. Car sits a little lower too. You should change the springs as well.
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Today, 09:55 AM	#3
whyzee125 Brigadier General 1960 Rep 3,991 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	If you're wanting the smoothest ride quality, I think the stock springs are the best choice. This platform doesn't have a ton of bump travel to work with, so reducing that further will increase the amount of bottoming out you do (unless you increase spring rate which most perceive to be less comfortable). If you're looking for a more planted feel in exchange for a little smoothness, then afermarket springs can get you there. I'm not as familiar with the xi's, but I know on the rwd's, Eibachs are a mixed bag because they are lower but not stiffer than stock leading some to hit the bump stops more often than they'd like.
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