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Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Community Media
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts (Part Number: )
Whiteline Rear Diff Positive Power Kit Inserts
Subaru Models (inc. 2008-2014 WRX/STI)
Read 42 Reviews | 13 Q&As
Part # KDT903
$44.56
28%
OFF
msrp: $61.89

In stock! Ships same day

Features & Product Details

The Whiteline Rear Differential Positive Power Kit Inserts are inserts to the rear differential bushings.  These are not factory replacement bushings, these are designed to fill in the voids of the factory bushings so you don’t have to press the factory bushings out. The job of the Whiteline Rear Diff Positive Power Kit is to secure the rear diff in its cradle within the subframe.

Your rear differential will have substantial movement or flex under hard launches, as well as hard acceleration. After installing these Whiteline inserts, the movement will be significantly reduced, and this will improve cornering, and improve launches, and overall improve the feel and dynamics of the car. 

Specifications

Brand: Whiteline
Bushing Location: Rear Differential / Differential Support
Installation Hardware Included: No, reuses OEM
Material: Urethane
Mfgr. Warranty: 1 year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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REVIEWS & CUSTOMER MEDIA

42 Reviews
4.9 out of 5 Stars
5 Stars
(38)
4 Stars
(4)
3 Stars
(0)
2 Stars
(0)
1 Stars
(0)
Customer Photos and Videos
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
Whiteline Rear Diff Positive Power Kit Inserts ( Part Number: KDT903)
0 of 1 people found the following review helpful
WOW 10 months ago
Boostin
Can't believe what an improvement these made on the overall driveabililty of my 11 WRX hatch. Shifts are significantly smoother (especially 1st to 2nd) and the power delivery is immediate when you get on it, it just hauls a**! Also significantly reduced the rubber-band effect when letting off the gas at low speeds. I really wish I would've bought these sooner. I had these installed within an hour tops. Shipping was super quick (only took 3 days). Will continue to order from RSD!
  
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1 of 1 people found the following review helpful
Used with Pos Trac Inserts 1 year ago
NowItWrx
I should have greased these up more, you should too. Paired with the Pos Trac inserts, I could feel the rear wheels work. On a 14 wrx, stock suspension, you know its AWD but it tends to feel like FWD or like you are floating in between 4 wheels when pushing it in corners. With the bushings, you know where you are located and can feel the rear wheels actively gripping and providing power.
  
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0 of 1 people found the following review helpful
Rear Diff Bushing Inserts 1 year ago
christophercoleman7777383
I just installed these inserts.. top two went in just fine, the bottom two around the rear diff a pain. The nut on the driver side by the exhaust had been stripped to someone already messing with it before me. I didn't really notice a difference until I got on open road and gave it the beans.... WOW what a HUGE difference under load... for the money and mostly simple install.. def worth it. I will be buying the whiteline rear suspension inserts next with the steering rack bushings too..
  
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0 of 1 people found the following review helpful
KDT903 installed in 2016 STI 2 years ago
VAB_STI
I wanted to confirm for anyone that is unsure if these fit the 2015+ STI. I have a 16 and installed these in rear diff craddle mount. These are excellent for taking out the slop in the drivetrain in the rear. Whiteline also shows that KDT903 installs in GR and VAB chassis.
  
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2 of 3 people found the following review helpful
Must Do Upgrade 2 years ago
CarTuned
I installed this product and immediately noticed the difference. The car has less give (if you will) when applying the throttle and it feels much more responsive, as if the slop in the rear diff was eliminated altogether. This is a must do upgrade to any WRX/STi!
  
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QUESTIONS & ANSWERS

  • Q: fitment  gofastparts3 years ago

    whitelines website shows this part number to fit the 2015 and 2016 model year wrx and sti but the filters on your site show this does not fit. whitelines part number with 2016 sti selected as filter shows kdt903 any clarification
    • 0 of 1 people found the following answer helpful

      A:  These should work on your car. I believe we just need to update the confirmed applications list on our end.

      Josh P. @ RallySport Direct 3 years ago  
        
      Was this answer helpful?
  • Q: would it fit a 2000 subaru legacy gt 2.0 wagon   bossross3 years ago

    Just wondering if it will fit! Please let me know asap I need to buy them. Any other easy upgrades I could do let me know I need info! Thanks
    • 0 of 1 people found the following answer helpful

      A:  Hello BossRoss, No this kit (KDT903) is not confirmed for your 2000 Legacy. The correct rear differential insert for your vehicle would be KDT927. If you have any other questions, feel free to contact us directly at [email protected]

      Jonathan @ Whiteline @ Whiteline 3 years ago  
        
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  • Q: Torque  Mellopl4 years ago

    What ft-lb do these need to be torqued back to? I will be ordering these in the next few days and I'd like to be ready to put them on right.
    • 1 of 1 people found the following answer helpful

      A:  The torque of the bushing nuts should be the factory specs of 51.6 ft-lbs.

      guest569faaee2a8d2517038b4568 @
        
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    • 0 of 0 people found the following answer helpful

      A:  Our installation instructions are generally designed to be used with the factory shop manual. The torque specs for this kit would need to be attained from the factory shop manual or a Subaru Dealer. However Duder did supply some torque specs below for a 2012 STI which seem to be fairly accurate. I recommend confirming the torqu specs for your vehicle with a trusted source.

      Jonathan @ Whiteline @ Whiteline 4 years ago  
        
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  • Q: whiteline rear poss. inserts  buc20134 years ago

    can I use Whiteline rear diff. positive power kit inserts with Prothane subframe inserts ? or are they the same inserts? does whiteline make inserts for subframe ? does rallisport have them here
    • 0 of 0 people found the following answer helpful

      A:  The rear diff positive power kit will be different from the Subframe inserts and you could use both. Whiteline does not make subframe inserts however, our Perrin or our Kartboy have shown to be just as great!

      guest57853c642a8d25b5018c44a7 @
        
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  • Q: whiteline rear diff.posi. power kit inerts   buc20134 years ago

    do these fit a 2011 impreza non/turbo auto.

This Part Fits

Subaru Impreza
2.5 GT Hatchback
2009 Subaru Impreza 2.5 GT Hatchback
2010 Subaru Impreza 2.5 GT Hatchback
2.5 GT Sedan
2009 Subaru Impreza 2.5 GT Sedan
2010 Subaru Impreza 2.5 GT Sedan
2.5i Hatchback
2008 Subaru Impreza 2.5i Hatchback
2009 Subaru Impreza 2.5i Hatchback
2010 Subaru Impreza 2.5i Hatchback
2011 Subaru Impreza 2.5i Hatchback
2.5i Premium Hatchback
2010 Subaru Impreza 2.5i Premium Hatchback
2011 Subaru Impreza 2.5i Premium Hatchback
2.5i Premium Sedan
2010 Subaru Impreza 2.5i Premium Sedan
2011 Subaru Impreza 2.5i Premium Sedan
2.5i Sedan
2008 Subaru Impreza 2.5i Sedan
2009 Subaru Impreza 2.5i Sedan
2010 Subaru Impreza 2.5i Sedan
2011 Subaru Impreza 2.5i Sedan
Outback Sport
2008 Subaru Impreza Outback Sport
2009 Subaru Impreza Outback Sport
2010 Subaru Impreza Outback Sport
2011 Subaru Impreza Outback Sport
WRX Hatchback
2008 Subaru Impreza WRX Hatchback
2009 Subaru Impreza WRX Hatchback
2010 Subaru Impreza WRX Hatchback
2011 Subaru Impreza WRX Hatchback
2012 Subaru Impreza WRX Hatchback
2013 Subaru Impreza WRX Hatchback
2014 Subaru Impreza WRX Hatchback
WRX Limited Hatchback
2010 Subaru Impreza WRX Limited Hatchback
2011 Subaru Impreza WRX Limited Hatchback
2012 Subaru Impreza WRX Limited Hatchback
2013 Subaru Impreza WRX Limited Hatchback
2014 Subaru Impreza WRX Limited Hatchback
WRX Limited Sedan
2010 Subaru Impreza WRX Limited Sedan
2011 Subaru Impreza WRX Limited Sedan
2012 Subaru Impreza WRX Limited Sedan
2013 Subaru Impreza WRX Limited Sedan
2014 Subaru Impreza WRX Limited Sedan
WRX Premium Hatchback
2010 Subaru Impreza WRX Premium Hatchback
2011 Subaru Impreza WRX Premium Hatchback
2012 Subaru Impreza WRX Premium Hatchback
2013 Subaru Impreza WRX Premium Hatchback
2014 Subaru Impreza WRX Premium Hatchback
WRX Premium Sedan
2010 Subaru Impreza WRX Premium Sedan
2011 Subaru Impreza WRX Premium Sedan
2012 Subaru Impreza WRX Premium Sedan
2013 Subaru Impreza WRX Premium Sedan
2014 Subaru Impreza WRX Premium Sedan
WRX STI Hatchback
2008 Subaru Impreza WRX STI Hatchback
2009 Subaru Impreza WRX STI Hatchback
2010 Subaru Impreza WRX STI Hatchback
2011 Subaru Impreza WRX STI Hatchback
2012 Subaru Impreza WRX STI Hatchback
2013 Subaru Impreza WRX STI Hatchback
2014 Subaru Impreza WRX STI Hatchback
WRX STI Limited Hatchback
2011 Subaru Impreza WRX STI Limited Hatchback
2012 Subaru Impreza WRX STI Limited Hatchback
2013 Subaru Impreza WRX STI Limited Hatchback
2014 Subaru Impreza WRX STI Limited Hatchback
WRX STI Limited Sedan
2011 Subaru Impreza WRX STI Limited Sedan
2012 Subaru Impreza WRX STI Limited Sedan
2013 Subaru Impreza WRX STI Limited Sedan
2014 Subaru Impreza WRX STI Limited Sedan
WRX STI Sedan
2011 Subaru Impreza WRX STI Sedan
2012 Subaru Impreza WRX STI Sedan
2013 Subaru Impreza WRX STI Sedan
2014 Subaru Impreza WRX STI Sedan
WRX STI Special Edition Hatchback
2010 Subaru Impreza WRX STI Special Edition Hatchback
WRX Sedan
2008 Subaru Impreza WRX Sedan
2009 Subaru Impreza WRX Sedan
2010 Subaru Impreza WRX Sedan
2011 Subaru Impreza WRX Sedan
2012 Subaru Impreza WRX Sedan
2013 Subaru Impreza WRX Sedan
2014 Subaru Impreza WRX Sedan