cd009 gear ratio PRE-ORDER, JULY 2026: CD009/A reinforced, straight cut motorsports gea – ADOPT Motorsports
SKU: 94386351171
cd009 gear ratio

cd009 gear ratio PRE-ORDER, JULY 2026: CD009/A reinforced, straight cut motorsports gea – ADOPT Motorsports

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Ships within 48 hours · Estimated delivery Jul 1 - Jul 6

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Description

cd009 gear ratio PRE-ORDER, JULY 2026: CD009/A reinforced, straight cut motorsports gea – ADOPT MotorsportsADOPT specification reinforced motorsports gearset for the Nissan CD009 A 6MT transmission in all applications, including conversions. Features high strength straight cut spur gears and reinforced input shafts. Drop in replacement for OEM standard gearset, including all conversions (RB, JZ, UZ, etc.) Race car type gear whine from spur gears. Two formats: Synchromesh, smooth shifts with reinforced internals. Dog box, true circuit specification. ETA to

ADOPT-specification reinforced motorsports gearset for the Nissan CD009/A 6MT transmission in all applications, including conversions. Features high-strength straight cut spur gears and reinforced input shafts. Drop-in replacement for OEM standard gearset, including all conversions (RB, JZ, UZ, etc.)

Race car type gear whine from spur gears.

Two formats:
Synchromesh, smooth shifts with reinforced internals.
Dog box, true circuit-specification. ETA to market JULY 2026. First orders ship OCT 2026.

Three gear ratio sets:
S1: Reinforced synchro Sports set for road and dual-use cars. 1st and 6th gears made taller for better drivability and commute fuel economy for those with 3.916 and shorter final drives; 2nd-4th more tightly grouped for rowing through gears; 4th shortened so a pull at wide open throttle will be only marginally legal when hitting redline.

R1 Dogbox: S1 with dog gears for enhanced durability under more severe use.

R1C Cross/close-mission dogbox: Dedicated circuit specification. 6th gear has been adjusted to just barely meet the top speeds possible at most tracks on front straights, and 1st-5th have been evenly distributed around common cornering speeds, preventing excessive shifting but keeping the engine RPM between peak torque and peak horsepower. Complete 1st-6th replacement only. 

Custom: Bespoke set of gearing on request for additional fee.

Four gear packs:

1st-6th: complete replacement, including reinforced input shaft.

OPTION: 6th gear, straight cut and reinforced for circuit users. No cost.
OPTION: 6th gear, helical cut and reinforced. Keeps 6th gear quiet for those dailying or commuting with their cars. No cost.

1st-4th multipack: $2200 cheaper for the same benefit, where 5th and 6th can be left OEM. Replaces only the gears used during sports driving.

3rd-4th pack: Budget option to get racing performance (and gear whine) for the most used gears in sports driving.

1st-2nd C pack: A slice of the close-mission, in synchromesh form. Much taller gearing so 1st and 2nd gears can be functional on even short final drives. 

Pricing includes mandatory Federal tariff which will revert to base MSRP if the tariffs are lifted.

Product of Australia 🦘. Lead time: 3.5 months. ETA to market: JULY 2026

Disclaimers: This product is meant to be installed into new transmissions; if retrofitting a partial gearset, additional wear of the original parts may occur from increased load. It is highly recommended that a transmission refresh be done during installation for this reason. 

This is a motorsports product, and will stress all driveline components more strongly than stock. Always be sure your car is capable of handling this increased load, including but not limited to motor mounts, transmission mounts, and differential bushings. 

Returns from improper use, modification, improper install, or damage induced from used/unserviced system components cannot be claimed.

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: 94386351171

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N. Fasso
Charlottesville, US
★★★★★ 4
Great filter, but doesn't fit 2013 Honda Fit without modification
Size: 8.3" x 9.3" x 1.3"
Right off the bat: I don't have any airflow problems with this filter. It works great, the air is noticeably cleaner, and airflow has not been meaningfully reduced. However, it doesn't fit my air filter holder very well. The ' air filter holder' (a plastic tray that slides horizontally into the air flow system) has two plastic fringes on either side of the tray, which each have two small notches in them, a few inches apart from one another. This appears to act as a sort of 'key' by which you can gauge you are putting the filter in with the correct alignment. On an OEM filter, the slots line up with two strips of material that stretch across the length of the filter, which themselves rest within the slots. However, the slots don't line up with the strips on this filter. I had to cut the fringes so that the slots in them are wider, so the strips would fit in them. Without doing this, the filter wouldn't press down into the tray. Having done that, and the filter now rests flush in the tray, there are still marginal gaps around the perimeter of the filter. It's a millimeter or two too small for the tray, so there is some airflow around the filter. This could be rectified by wrapping insulation tape or something around the edge of the filter, or could be ignored if you're not super picky. I haven't added any wrapping to get an airtight seal, and even with that gap I still noticed that the air is way better. So ultimately, it didn't fit exactly, but it fits 90% of the way and, with some finagling, is a superior filter by any other measure.
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Reviewed in the United States on December 3, 2018
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Locutus
Port Orchard, US
★★★★★ 5
Don't overlook this important bit of maintenance
Size: 8.3" x 9.3" x 1.3"
Cabin air filters get dirty and gross quicker than you realize. I recommend changing them twice a year. Bosch is a quality brand, very happy with it.
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Reviewed in the United States on March 8, 2026
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clutz
Lowell, US
★★★★★ 1
Better than Honda Cabin Filter for Allergies -
Size: 8.3" x 9.3" x 1.3"
Installation took all of 3 minutes. Noticeable improvement in air quality (less allergy response) since installation. Others mentioned a reduction in air flow but have not noticed a change. ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Update (9/2020) Noticeable reduction in air flow. I have needed to increase the fan speed to make the cabin comfortable. I may be switching brands soon. I will pull the filter at 6 weeks and see if it is getting plugged (yikes). //////////// Update (10/2020) I pulled the Bosch filter expecting it to be plugged due to the lack of air flow. I was surprised to see it was clean. There were are few small pieces of stuff in the folds of the filter but only about 10 of them. I held the filter up to the light and then tapped it on white paper to see what would fall out. There was nothing present to explain the extreme loss of air flow. I have used Bosch cabin filters in my other vehicles (not HEPA) with great success. I was hoping to help the allergies of my family but having to run the fan on high to receive any airflow was more annoying than helpful. The noise was irritating and the air flow was still less than the Honda filter I removed. I purchased a new Honda cabin filter and our van is back to normal. I did not realize how much I missed the auto temperature setting. I was setting the temperature about 5 degrees below "normal" to try and keep the temperature consistent, and it was not during the hotter summer months. Unfortunately I am beyond the 30 day Amazon return window so I am not able to return the cabin air filter. :-( This is my first Amazon review that moved from 5 to 1.....
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Reviewed in the United States on August 18, 2020
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Robert
Belleville, US
★★★★★ 5
Highly recommended
Great price, great product, and I will definitely buy more parts from Amazon in the future.
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Reviewed in the United States on July 25, 2025
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Norman Smith
Los Angeles, US
★★★★★ 5
Perfect
Super fast shipping and fit like a glove!
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Reviewed in the United States on July 27, 2025

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