SKU: 85598845087
6th gear

6th gear Long Ratio 6MT Gear Kit - 2nd-6th Set

Sale price$19.51 Regular price$21.68
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

6th gear Long Ratio 6MT Gear Kit - 2nd-6th SetHIGH SPEED RATIOS Our long ratio set offers a matched set of replacement gears and main shaft for 2nd 6th gear. For USDM MY04 06 STI transmissions this provides improved 2nd 4th gear ratios making the car more suitable for drag racing, and higher speed road courses as well as general street performance driving. This also applies to all JDM STI models (or other international applications using the same ratios). For MY 07 21 USDM STI transmissions the

HIGH SPEED RATIOS

Our long ratio set offers a matched set of replacement gears and main shaft for 2nd-6th gear.  For USDM MY04-06 STI transmissions this provides improved 2nd-4th gear ratios making the car more suitable for drag racing, and higher speed road courses as well as general street performance driving.   This also applies to all JDM STI models (or other international applications using the same ratios).  For MY 07-21 USDM STI transmissions the 2nd-4th gear ratios will be unchanged (MY19-21 slight 3rd gear ratio difference).  The 5th and 6th gear ratios are the tallest ratios available and will reduce highway rpms as well as extend the usable speeds in those gears.  The 5th and 6th gear set can be purchased separately if desired.

All gears are REM ISF© treated.  ISF (isotropic superfinishing) is a treatment process that eliminates roughness and microscopic grooving created by the machining processes establishing a highly polished part with minimal dimensional change.  It is non-directional and strengthens the part by reducing or eliminating stress raisers on the surface that can initiate cracks and failures.  The lowered surface roughness has the benefits of reducing friction, lowering gearbox oil temperatures, and eliminating any need for running in the gears prior to fully loading them.

These are factory-based gears and even with the superfinishing process will not hold up to extreme power outputs.  We suggest a maximum of 600whp.

NOTE:  MY04-07 version includes MY07 2nd and 3rd gear synchronizers (required for proper fitment in MY04-06).   This set can be fitted to MY01-03 JDM, UK, or EDM models but requires updating 1st driven gear, 1st/2nd Sleeve & Hub, and 1st/2nd Shift Fork.  Contact us for MY01-03 details.

Gear Ratios (1st-6th):  OEM / 2.235 / 1.521 / 1.137 / 0.891 / 0.707

What it fits:

  • STI MY04-21 (TY856 MT)
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: 85598845087

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Based on 24 reviews
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A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 5
Great true inflator
Great tire inflator also own a jumper pack in this brand, easy to use and great function to set the disired psi and auto shut off.
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Reviewed in the United States on January 18, 2026
M
Verified Purchase
Michael D. Campion
Chelsea, US
★★★★★ 5
Delivers great PSI for a small package
Unit works great ! I love the fact you can preset the psi. cut off ( I had to pump up some air shocks to 135 the unit did it with no problem ! )
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Reviewed in the United States on May 6, 2026
L
Verified Purchase
Luis Fernando Cortes
Massapequa, US
★★★★★ 4
Good inflator
Not the best one but works well!
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Reviewed in the United States on March 8, 2026
K
Verified Purchase
KSiy
Boise, US
★★★★★ 5
Excellent Value for Price
I highly recommend one of these in your vehicle for emergencies. Don't fall for those handheld cordless ones you see on social media. Those will only inflate 1-2 tires before depleting. You have unlimited power for the plugins and it will inflate at least 4x faster. The AstroAI is compact, lightweight and powerful for its price. Everything folds into its rectangular form factor for easy storage. The UI is simple and to the point. You can easily set the target pressure and it will auto stop. It's also a nice looking design with black and yellow which are common colors for power tools and emergency equipment. If I were being picky, the 2 minor cons that you'll find in other brands are: no option to plug into wall outlet & doesn't come with a case or bag.
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Reviewed in the United States on November 22, 2025
J
Verified Purchase
JC
Whiting, US
★★★★★ 5
Great quality and design! Compact and easy to store in your car for emergencies.
These are handy to keep in your car for emergencies. Now that the weather is getting colder my tire pressure is going down on my car and I got tired of having to drive to a fas station and pay to put a bit of air in my tires (and often times those machines don't even work). I like design of this one with the always on light and the compartment on the back to store everything neatly. It is small and compact so it doesn't take much space to store in your car. It also comes with multiple attachments for various uses. I purchased this one as a gift for a white elephant gift for a family party coming up and hoping it will be a hit! With the great sale price it fit perfectly in the price range that was set.
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Reviewed in the United States on December 8, 2025

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