SKU: 79029030392
high speed gears

high speed gears Long Ratio 6MT Gear Kit - 2nd-6th Set

Sale price$23.25 Regular price$25.83
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

high speed gears 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: 79029030392

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Paul
Phoenix, US
★★★★★ 5
Excellent sound deadening mats
Style: 80 mil 36 sqft, Style: 80 mil 36 sqft
Purchased these for a 2020 Lexus RX350 due to the hollow sound of the car doors when shutting. They sounded cheap. The mats are super sticky and I applied them when the doors were hot from sitting in the sun. They alubutyl sticks like crazy and the end result was perfect. Now I have solid sounding doors. Good quality product.
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Reviewed in the United States on May 20, 2026
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Amazon Customer
Birmingham, US
★★★★★ 5
Awesome product 👌
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
I love this stuff. I use it alot. Sticks great Easy to use Molds super easy Really helps with sound. Great product. I wish I could get sponsored for this product on my projects..
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Reviewed in the United States on April 30, 2026
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john l fields
Los Angeles, US
★★★★★ 5
Good product at a good price
Style: 80 mil 36 sqft
This product works great and easy to install. I do two or more vehicles a month. I switch to this brand a year ago and would recommend to everyone of my customers
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Reviewed in the United States on April 16, 2026
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napoli
San Leandro, US
★★★★★ 4
Good deal for the price
Style: 80 mil 18 SqFt
The product is good and contrary to some comments I read it was not a mess to install and went on very nicely. That said I placed on a 71 Baracudda and starting from a 71db I was able to drop that down to about 66 with two layers Kilmatt 80mil
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Reviewed in the United States on April 18, 2026
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#1 Ford
Alexandria, US
★★★★★ 5
Kilmat Car Sound Deadening Mats
Style: 50 mil 25 SqFt
Easy to install in a vehicle! Helps keep the heat out as well as keeping it quieter inside my car. Self sticking to the inside of the roof without strong smelling adhesives. The quality of these pieces work very well in my vehicle!
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Reviewed in the United States on May 19, 2026

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