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Whiteline Rear Diff Support Lock Bushings (Part Number: )
Whiteline Rear Diff Support Lock Bushings (Part Number: )
Whiteline Rear Diff Support Lock Bushings (Part Number: )
Whiteline Rear Diff Support Lock Bushings (Part Number: )
Whiteline Rear Diff Support Lock Bushings (Part Number: )
Whiteline Rear Diff Support Lock Bushings
Subaru Models (inc. 2002-2007 WRX/STi)
Read 6 Reviews | 4 Q&As
Part # KSB751
msrp: $46.37

In stock! Ships same day

Features & Product Details

RallySport Direct is proud to provide you with a large catalog of Whiteline products. 

On this page, you are looking at the Whiteline Rear Differential Support Lock Bushings. 

Here are the details:

  • Helps eliminate movement of the rear differential front support
  • Improvements can be noticed throughout all throttle ranges, hard acceleration, and hard braking
  • Made from super durable urethane materials which helps reduce deflection
  • 6 bushings included
  • Specifications

    Brand: Whiteline
    Bushing Location: Outrigger
    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.
    RallySport Guarantee



    6 Reviews
    5 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    No user media. You can upload a photo or video of your install by posting a review.
    Nice clean shifts 6 years ago
    5out of 5stars

    Very easy simple install realistically took about 15mins with basic tools. Cheap quick mod and the shifting connects more and you can really feel the difference in between shifts. Would recommend anyone on a budget and racing quality shifting. Makes vibrations in the car but I don't mind they are subtle.
    Was this review helpful?
    1 of 1 people found the following review helpful
    great product for the price, simple install 6 years ago
    5out of 5stars

    these things are wonderful for how cheap they are. Installation literally takes 15 minutes in your driveway with 2 different sized sockets. No extra NVH that I can tell so far. If you get these you do not need to get the full outrigger bushing replacements offered by whiteline, this will do the exact same thing, will not increase NVH by any measurable amount as well as take much less time to install. If you can lay on your back and turn a wrench you can do this install.
    Was this review helpful?
    Cheap but amazing mod. 8 years ago
    5out of 5stars

    Amazing what these things do. Install is super easy.
    Was this review helpful?
    A must have!! 8 years ago
    5out of 5stars

    Don't think twice just buy these. You're car will thank you!!!
    Was this review helpful?
    great product 8 years ago
    5out of 5stars

    fast easy install, world of differance, small amount of NVH increase nothing crazy.
    Was this review helpful?


    • Q: Vs. Subframe bolts?  T.J.2 years ago

      How does the purpose of these bushing kits compare to the subframe bolts from whiteline etc? Thanks, T.J.
      • 0 of 0 people found the following answer helpful

        A:  These bushings replace the subframe rear diff support. These are completely different from the subframe bolts.

        Tyler A. @ RallySport Direct 2 years ago  
        Was this answer helpful?
    • Q: Do I need both?  DocB043 years ago

      Do I need to order these in conjunction with the Whiteline Rear Diff Bushings?
      • 0 of 0 people found the following answer helpful

        A:  Hi DocBO4, We offer two "rear differential" bushings for the same generation Subaru's: W91380 and W91379. This kit (KSB751) and W91379 mount in the same location and you would not be able to install BOTH simultaneously. W91380 does mount in a separate location and CAN be used in conjunction with KSB751 (and is highly recommended), but is not mandatory. I hope this helps.

        Jonathan @ Whiteline @ Whiteline 3 years ago  
        Was this answer helpful?
    • Q: 2006 Forester XT  Hinkes4 years ago

      Are these rear diff support lock bushings be used together with the rear diff support outrigger bushings? Or are they two different fixes one is easier (support lock bushings) and the other is harder (support outrigger bushings).
      • 1 of 1 people found the following answer helpful

        A:  These rear diff support lock bushings serve the same purpose as the outrigger bushings and they are not intended to be used together. These inserts are an addition to the stock bushings, and the outrigger bushings replace the stock bushings. The inserts work well and they are much easier to install.

        Zach G. @ RallySport Direct 4 years ago  
        Was this answer helpful?
      • 1 of 1 people found the following answer helpful

        A:  As Zach mentioned, the two kits you referenced are designed for the same location on the vehicle and are not designed to be used together. I generally recommend the inserts for vehicle's that OR bushings that are still in good condition as they are easier to install, cost less, and have almost the same level of performance when used with a bushing in good condition. If your OE bushings have deteriorated significantly, then a complete replacement bushing may be a better route.

        Jonathan @ Whiteline @ Whiteline 4 years ago  
        Was this answer helpful?
    • Q: this vs perrin SLK  axelbowen667485 years ago

      Is this the same as the PERRIN subframe lockdown kit?

    This Part Fits

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