SKU: 21202347433

MFactory 3.90 Final Drive Honda S2000 AP1 AP2 F20C F22C

$295.49 $328.32
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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17

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Description

MFactory 3.90 Final Drive Honda S2000 AP1 AP2 F20C F22CAchieve the ultimate in acceleration with the MFactory Final Drive Gears. By changing your final gear ratios, you can experience a dramatic increase in acceleration, giving you on average, a 10 15% increase in torque throughout the entire rev range over the OEM Final Drive. Diamond Cut to exacting tolerances from Forged High Nickel Chromium Molybdenum Steel Perfect fitment & finish ensures hassle free installation & maintenance, each and every time

Achieve the ultimate in acceleration with the MFactory Final Drive Gears. By changing your final gear ratios, you can experience a dramatic increase in acceleration, giving you on average, a 10-15% increase in torque throughout the entire rev-range over the OEM Final Drive.

Diamond Cut to exacting tolerances from Forged High-Nickel-Chromium-Molybdenum Steel
Perfect fitment & finish ensures hassle-free installation & maintenance, each and every time

Designed using leading-edge Solidworks 3D CAD & Cosmos FEA software
Advanced Gear Geometry minimizes parasitic drivetrain losses. Race transmissions built with MFactory components transfer, on average, 1-2% more power to the ground over our competitors!

Specifications

  • Made from imported Japanese SAE 8620 and 4320 Steel
  • Forged, Double Tempered and Super Sub-Zero treated for unsurpassed toughness
  • Advanced Shot Peening technology increases surface hardness
  • Advanced gear geometry designed using industry-leading software puts more power to the ground

Fitment Notes Honda B16A2 Fitments: Will not fit models equipped with Factory LSD

Honda B16A2/16B/18C Fitments: Offering a revised design over our previous generation Final Drive Gears. Forged from stronger steel with a 50% larger tooth profile yet almost 1kg lighter!

Honda Cable Fitments: Will not fit models equipped with Factory LSD. 92-93 YS1 transmissions should use B16A2 fitments

Honda '98 Spec Fitments: Designed for the '98 Spec Integra Type-R with Factory 4.785 Final Drive

Honda H22A Fitments: Will not fit ATTS-equipped transmissions. Is also suitable for Euro-R/Accord Type-R

For Ford Focus MTX-75: Designed for 2002+ Transmission Only. Will only fit applications using the 1pc Pinion (Removable 3rd & 4th Gear)

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: 21202347433

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4.1 ★★★★★
Based on 7 reviews
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Product Reviews
D
Verified Purchase
Daniel H.
Omaha, US
★★★★★ 5
For Anxiety and Sleep
Size: 30 Count (Pack of 1)
Definitely recommend, a family members psychiatrist prescribed it vs big pharma medication as it's been proven to work as well as many anxiety meds without the side effects, it helped with the anxiety that my family member was diagnosed with, take before bed to calm the mind and for better sleep, and take it consistently
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
K
Verified Purchase
Kiyoko Kanegae
Houston, US
★★★★★ 4
they're decent supplements
Size: 30 Count (Pack of 1)
my psychiatrist recommended these to me to help with my stress & anxiety induced insomnia but so far they don't really help a whole lot aside from making me a bit sleepy. it wore off pretty quickly the first few nights but overall i'd say they're pretty decent, just a bit on the spendy side to be getting regularly. they do cause some burping, though i expected that much going off of the reviews and it was only the first night i tried them.
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Reviewed in the United States on April 11, 2026
J
Verified Purchase
Jonathan Vaughan
Houston, US
★★★★★ 5
A Powerful Anxiolytic and Sleep-Enhancer
Size: 30 Count (Pack of 1)
I have tried a plethora of non-pharmaceutical anxiolytics, and I can say that CalmAid is by far the most effective. For me, the effects are comparable to a low dose of Ativan, but without the drugged feeling. Here are the main things I notice: -Relaxed heartbeat. My heartbeat is usually very pronounced, but when I take lavender, it calms down dramatically. -Quieter thoughts. I don't know how to describe this except to say that the "volume" of my thoughts is turned way down on lavender. -Tremendous sense of calm. It's very hard to get upset or agitated or anxious while under lavender's influence. -Improved sleep. I've suffered from horrible insomnia for a long time, and lavender is one of the only remedies that's had a noticeable effect. It doesn't make me drowsy per se, but it makes me so calm and relaxed that sleeping is easier. However, there are some "side effects" (I use the term loosely) to be aware of when using this: -Reduced energy. I suspect this is just the lavender calming my stress response and revealing fatigue that's already present to some degree, but it's worth noting. As I mentioned, lavender doesn't make me tired, but it makes me just want to kick back and chill rather than doing anything very active or exciting. -Reduced motivation. Tying into the above, when using lavender I would often rather relax and watch a movie or read instead of getting work done. This is, I suspect, the dark side to being incredibly calm, whether it's lavender or something else making you that way. When you're calm, nothing seems to matter that much, including work. Ergo, you have less motivation. I think a certain amount of anxiety is healthy for optimal motivation, and lavender does away with that. -For these reasons, I don't consider lavender an optimal anxiolytic for social anxiety, because energy and motivation are so important in social situations. I suffer from social anxiety, and have used lavender to deal with this at times, and though it does make me less anxious, it also makes me less social. I'd recommend something more like phenibut for social situations. Despite these limitations, I still consider this an essential component in my anti-anxiety toolkit. I just try not to use it too often. Also, it's worth noting that human studies on lavender are somewhat lacking, and without more data, we don't know what the long-term effects of using it are. As with any drug (and I do consider this a drug), I think it should be used as little as possible. I would, however, much rather use this than a pharmaceutical anxiety medication. A final note, on when to take it: I've found the best time to be 30 minutes before bed, on an empty stomach. The effects are more dramatic when taken well away from food, and if you take it before bed, you get the sleep-enhancing effects immediately, and the anxiolytic effects all throughout the next day (it lasts a looong time).
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Reviewed in the United States on November 2, 2017
V
Verified Purchase
Verified purchase
West Palm Beach, US
★★★★★ 3
Effective, but gave me a headache
Size: 30 Count (Pack of 1)
I did and do like these. I find it takes the edge off my anxiety. Oddly enough, they give me a headache the next morning. I tried only taking one pill at bedtime (instead of a second one halfway through the night); I made sure it wasn’t dehydration; I took electrolyte solution with it. I’ve pretty much eliminated anything else that a headache could’ve been caused by that I can think of. They work well enough for me that on some nights it’s going to be toss up and I will still take it. But it’s kind of a drag knowing that something natural that works has a residual headache the next morning.
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Reviewed in the United States on August 1, 2025
O
Verified Purchase
Olivia
Alexandria, US
★★★★★ 5
Day 1 and A Week ish Later
Size: 30 Count (Pack of 1)
I was taking Olly Stress Relief gummies for a while to control anxiety, hyperactivity and racing thoughts, and they worked great. Recently I noticed that they were becoming a lot less effective and started searching for alternatives. This was my first choice and I've only used it this morning. Took one pill. So far I have noticed a lighter mood, lack of racing thoughts, and an overall feeling of being slowed down. I can focus on conversations better, and it slightly enhanced my ability to taste, flavors seem more vibrant.. I am a bit more "lazy feeling" as others mentioned, and I did get the lavender burps. They're not horribly obnoxious for me, just a bit different. Burps lasted maybe half an hour. So far I like it. Edit: it's been over a week now. The first few days I dealt with random headaches on and off, but did get benefits as stated above. After my body adjusted I stopped having the headaches and the "lazy" feeling. The lavender burps are still a thing and so is short term lavender breath right after taking a pill. You can describe it like a light lingering, kinda like toothpaste has a minty aftertaste, but lavender instead. For the most part I would still say it helps. It does not hit as hard as the first few days, but it is helping somewhat. Benefits for me: Less overstimulation in public, better ability to relax after work, anxiety is more "inconvenience", easier to focus, deeper sleep, less irritability. Cons for me: Short term lavender breath, vivid and unusual dreams, 2-3 day initial adjustment period for unpleasant side effects. What I'm doing: Taking one pill around 7-7:30pm daily with lots of water. Taking late to sleep off any potential unpleasant initial effects, and get better sleep.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 31, 2024

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