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Since I have some experience now with both manufacturers I am going to post my findings so far. I am not knocking or praising one over the other, simply a comparison for everyone. I have another thread about the other stuff. My truck is a 2023 XLT FX4 AWD with everything else being stock.
I started with the Eibach Pro kit and like others had the knock/thud/clunk noise in the front no matter what. After driving it for a while I feel like my installer and I determined that the spring rate was wrong and it had the progressive coils in the wrong location. I am still not convinced that is where the noise was coming from, but maybe? The ride on the Eibach's was actually quite nice I must say. Stock like ride until you threw in some bumps and crappy roads, then the ride was not as great but livable for a lowered truck. Not harsh even on the harshest roads. I only bottomed out once and that was on a bridge with a real sharp entrance and exit. But, I never felt like the truck handled like a lowered vehicle. I still experienced the same body roll as before when I was stock.
Now the H&R Super Sports, these are somewhat stiffer and the ride isn't as nice. It's not bad, but it isn't as nice to me. It does handle better and is flatter in the curves than the Eibach's though. But it isn't floaty feeling like it was before. I haven't bottomed out the H&R's over the same bridge I did with the Eibach's though. Which kind of tells me what we thought all along about the spring rate. I can't confirm any actual numbers, but seat of the pants feel tells me the spring rate is higher on the HRs.
Keep in mind I had about 1100 miles on the Eibach's and only about 150 on the H&R's so they are still breaking in I am sure. I haven't take any measurements with the HRs yet, but I will once they settle in a lil more and post the comparison to the Eibach's. I am not saying I would have switched if I didn't have issues with the noises, because I probably wouldn't. I have always had good luck with Eibach and they will get this figured out I am sure. So far I am happy that my truck is still lowered and has no noises to speak of yet. I hope my experience can help others.
I started with the Eibach Pro kit and like others had the knock/thud/clunk noise in the front no matter what. After driving it for a while I feel like my installer and I determined that the spring rate was wrong and it had the progressive coils in the wrong location. I am still not convinced that is where the noise was coming from, but maybe? The ride on the Eibach's was actually quite nice I must say. Stock like ride until you threw in some bumps and crappy roads, then the ride was not as great but livable for a lowered truck. Not harsh even on the harshest roads. I only bottomed out once and that was on a bridge with a real sharp entrance and exit. But, I never felt like the truck handled like a lowered vehicle. I still experienced the same body roll as before when I was stock.
Now the H&R Super Sports, these are somewhat stiffer and the ride isn't as nice. It's not bad, but it isn't as nice to me. It does handle better and is flatter in the curves than the Eibach's though. But it isn't floaty feeling like it was before. I haven't bottomed out the H&R's over the same bridge I did with the Eibach's though. Which kind of tells me what we thought all along about the spring rate. I can't confirm any actual numbers, but seat of the pants feel tells me the spring rate is higher on the HRs.
Keep in mind I had about 1100 miles on the Eibach's and only about 150 on the H&R's so they are still breaking in I am sure. I haven't take any measurements with the HRs yet, but I will once they settle in a lil more and post the comparison to the Eibach's. I am not saying I would have switched if I didn't have issues with the noises, because I probably wouldn't. I have always had good luck with Eibach and they will get this figured out I am sure. So far I am happy that my truck is still lowered and has no noises to speak of yet. I hope my experience can help others.
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