SKU: 87365435221

AST Suspension 5100 Comp Series Coilovers - BMW Z4 M Coupe / Convertible - E85 / E86 (06-08)

$2847.60 $3164.00
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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3

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Description

AST Suspension 5100 Comp Series Coilovers - BMW Z4 M Coupe / Convertible - E85 / E86 (06-08)Are you using your vehicle on the track? Or perhaps you're after a combination of track performance and seeking the ideal road balance for daily driving. In that case, the 5100 CLUBRACING SUSPENSION is the perfect choice for you. This set of coilovers enables you to optimize grip by managing rebound and ride height. Springs are included and top mounts front and rear. In this set front and rear dampers utilize a coilover design. By choosing this design

Are you using your vehicle on the track? Or perhaps you're after a combination of track performance and seeking the ideal road balance for daily driving.

In that case, the 5100 CLUBRACING SUSPENSION is the perfect choice for you.

This set of coilovers enables you to optimize grip by managing rebound and ride height. Springs are included and top mounts front and rear. In this set front and rear dampers utilize a coilover design. By choosing this design you prioritize adjustability and the performance of your car. Coilovers which will offer more adjustability for both damping settings and ride height, and typically provide more consistent and predictable handling characteristics. You have the flexibility to adjust springrates on these dampers.

The initial setup for setting and spring rates is rooted in our extensive development and testing process. Individual preferences can easily be fine-tuned by making adjustments to the rebound knob or altering the ride height. You can adjust the rebound, means you can control the return to extension of your dampers, enabling you to attain the ideal road balance tailored to your specific requirements. With 12 distinct positions to choose from, each adjustment delivers distinct feedback and a unique driving experience.

This set of suspension also includes, where applicable, camber-adjustable front Top Mounts and solid rear Top Mounts. The camber adjustment will offer you more wheel adjustment and allow this geometry to be altered to transform front -end grip. AST Suspension is a monotube design. This is a benefit for you because these dampers offer a large piston to control the adjustability of rebound damping. There is no aeration or foaming in monotube dampers, this will result in a more responsive valving. AST high pressure dampers will increase performance, when you need it, in various driving conditions.

These dampers are rebuildable, you can have them addressed at a certified AST service center.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 87365435221

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4.2 ★★★★★
Based on 18 reviews
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Verified Purchase
Kathy
Waukegan, US
★★★★★ 5
Price good
Size: 5T-6T, Unit Count: 80
Perfect for starters
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
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Verified Purchase
Larisa Thomason
Lexington, US
★★★★★ 5
Finally, a good night's sleep.
For almost a year, I've had sleep issues. No problem falling asleep, but I'd wake up 3 hours later and be up for the next 2-3 hours. I'd finally fall back asleep just a bit before the alarm and spend the rest of the day in a fog. It didn't matter whether I went to bed at 8:30 pm or 11pm - I was still up by 1:30-2 and awake for hours. It gradually got worse and I got desperate. A friend recommended Melatonin and I resisted at first, having tried it after our daughter was born (almost 15 years ago). The tablets I took then had some odd side effects and I only took them for a few weeks before throwing the bottle away. Now, I think I have have been taking far too high of a dose, because these 3mg tablets work great. Be careful when you take them! I'm awake and alert for about 20 minutes and then zone out totally - even in the middle of a conversation. After a couple of months, I've learned to just lay a tablet on my nightstand and take it when I'm ready to turn out the light. It works great: cured the problem of middle of the night sleeplessness. I still wake up sometimes at night, but have no trouble dropping back off to sleep. And when I wake up in the morning, I'm alert, energetic, and not already counting the hours until I can go back to bed to get a good night's sleep. For me, this supplement would have been a good buy at twice the price - and my family agrees. I'm rested, cheerful, and so happy I gave it a try. So far, no bad side effects. In fact, no side effects at all. I am taking it daily, but considering trying it on a more limited basis because of concerns about long-term effects. Considering, but haven't done it yet because I'm so enjoying a good night's sleep that I'm afraid to tinker with success! Although I saw results the very first night I took this, I waited to write a review just in case it was a placebo effect at work. But it's been 11 weeks and I'm confident that this product is really effective for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2012
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Verified Purchase
Madelene Caselli
San Leandro, US
★★★★★ 5
Time release.. ONLY way to go
Used this brand before... when refill needed, came back for more. Time release is the best way to go as it works all night. Not one big hit when you 1st go to sleep... A nice "hit"... to get you to sleep and then a slow release of the rest, to KEEP you asleep... Don't think you'll be disappointed. I use sustained release with any vitamin/supplement I take (assuming the company makes it) .. including this. It's the best way to allow your body to utilize the product.
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Reviewed in the United States on April 14, 2023
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Paul Belanger
Bozeman, US
★★★★★ 5
A subtle sleep enhancer.
Melatonin, in my experience, is a very subtle drug. I took it for about a month and then stopped before I actually saw what it was doing. It allowed me to fall asleep quicker and when I woke up during the night, to fall back asleep quicker as well. No more tossing and turning. I prefer the timed release version since I tend to sleep about 4-5 hours straight and then wake up sporadically after that. I had been buying the timed release from GNC but this brand is much cheaper, more pills, and just as effective. I've also tried popping another one after that initial 4-5 stretch of sleep to further prolong sleepy time, but I don't know how effective that is. It doesn't put you to sleep, so there's no grogginess when you wake up. It just jump starts the natural process.
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Reviewed in the United States on June 21, 2017
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Verified Purchase
Lucien M.
Alexandria, US
★★★★★ 4
Time release is the best way
I like these time released tablets. Time release is surprisingly hard to find unlike the immediate release style tablets. Time release allows for a longer sleep pattern as it enters the blood stream slowly over time allowing it to stay in you system. Immediate release will hit you hard and fast but your body will metabolize within a couple of hrs leaving you without the melatonin in you system. I took off a star for being pricey, but these do work very well.
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Reviewed in the United States on October 17, 2025

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