Skip to content
🌟 Shop The Mayhem Madness Sale 🌟
🌟 Shop The Mayhem Madness Sale 🌟
Rewards Program My Wishlist Customer Support Military Discounts The Subimods Blog The Motul Market Bread Pay™ Financing
Whiteline Rear Differential Positive Power Kit Inserts 2008-2021 WRX / 2008-2021 STI / 2010-2012 LGT / 2009-2016 FXT - KDT903 - Subimods.com

Whiteline Rear Differential Positive Power Kit Inserts 2008-2023 WRX / 2008-2021 STI / 2010-2012 LGT / 2009-2018 FXT / 2015-2019 Outback 2012-2016 Impreza

by Whiteline
SKU KDT903
$70.88 - $70.88
$70.88
$70.88 - $70.88
$70.88

Here, you are looking at the Whiteline Rear Diff Positive kit bushing kit. 

Thee bushings are designed to reduce the initial torque loss and movement through the rear differential mounts during acceleration and deceleration. These inserts fill in the voids that are in the OEM bushings and help to stiffen the rear differential. They are a great upgrade for anyone looking to improve the performance of their car.

Features: 

  • The latest in material formulation technology boasts resistance to oil, grease, ozone and weathering.
  • Supplied with extreme pressure molybdenum disulphide (LM) based grease for extended life.
  • Internal grease reservoirs provide continual self-lubrication for optimum friction management.
  • Inserts are designed to work with the original factory bushing rather than replacing it.
  • Protective plating on all metal components acts as a hard skin that is much tougher than conventional paint allowing this product to withstand the toughest conditions and resist corrosion for years to come.
  • This kit is covered by a limited lifetime warranty including parts and labour.
  • Install guide included providing detailed instructions on how to install your new purchase .

Customer Reviews

Based on 12 reviews
83%
(10)
17%
(2)
0%
(0)
0%
(0)
0%
(0)
91.7
100.0
A
Austin

Im not sure how everyone else had their install go , but I cannot get any of the rear diff bushings to fit even with grease, the fitment is EXTREMELY snug. It’s been frustrating to say the least.

UPDATE: a trick to make them fit in mounts that are not broken in is to take a razor blade and poke it all the way through the slots to allow easier fitment of the bushings. Once you’ve got the washer on simple push it into place by tightening the nut on top of it. My WRX only had 13k miles at the time of install, I suspect its more difficult because of this. With the pitch stop, and these bushings i noticed an improvement coming from a stop, and hardly (if any) NVH increase.

Austin,

Thank you for your detailed 5 Star Review! We appreciate your feedback and are pleased to hear that you found a solution to make the Whiteline Rear Differential Positive Power Kit Inserts work for your WRX. It's great to know that despite the initial challenge, the improvement is noticeable, especially coming from a stop, and that there was hardly any increase in NVH. We are grateful for your patience and for sharing your installation tip. Enjoy the enhanced performance!

Regards,

B
Brad Andresen
Great addition!

Great addition to firm up the driveline. Installations was very quick, taking less than 30 minutes start to finish. Small, but incremental difference in driveline stiffness I have noticed. Worth the price and a good compliment to other mods such as an upgraded trans mount, pitch stop, etc……

Brad,

Thank you for taking the time to leave a 5 Star Review! We are happy to hear that the Whiteline Rear Differential Positive Power Kit has made a noticeable difference in the stiffness of your driveline. We agree that it is a great addition to enhance your driving experience, especially when paired with other upgrades. Thank you for choosing Whiteline from Subimods and happy driving!

Regards,

N
Nick
Definitely can tell a difference

This is a must have along with pitch stop trans mounts etc..

Nick,

Thank you for the 5-Star Review! We are so glad to hear that you noticed a difference with the Whiteline Rear Differential Positive Power Kit Inserts. We agree that it is a must-have upgrade, along with other components like pitch stop trans mounts. We appreciate your support and hope you continue to enjoy the improved performance of your vehicle. Thanks again!

Regards,

R
Richard
It’s so small but helps so much

I wasn’t expecting much from the inserts but I had the JDM STI Mount and Whiteline positive shift kit bushings in my cart already so I figured why not for the price. They make the car way more enjoyable to drive. You can’t beat the price and it’s easy to install. It did take me longer than expected but that’s because I installed them with a sprained wrist.

Richard,

Thank you for leaving a 5-Star Review for the Whiteline Rear Differential Positive Power Kit Inserts. We are thrilled to hear that you are enjoying the product and that it has made a noticeable difference in your driving experience. We understand that installation can be a bit challenging, especially with a sprained wrist, but we are glad that it was worth it. Thank you for choosing Subimods and happy driving!

Regards,

M
Mike
No power loss

Took away the spongy feeling. There is no more flexing during launches and feels great for spirited driving. Incredible mod!

Mike,

Thank you for taking the time to leave a 5 Star Review for our Whiteline Rear Differential Positive Power Kit Inserts. We are thrilled to hear that it has improved your driving experience and eliminated any power loss and spongy feeling. We hope you continue to enjoy your spirited drives with our product. Thanks for choosing Subimods!

Regards,

123

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare