Raceseng MT Slammer Shift Knob

2015+ WRX / 2015+ STI


SKU: 08211BR-08013-081102We price match!

Only 3 left!
Ships today if ordered in
13 hrs 6 mins

615 grams... That is the number you need to remember. The Slammer is exactly what the name entails. The shape and mass make for one of the most enjoyable shifting experiences. The Slammer works with the factory and aftermarket reverse lockouts and comes with a threaded shifter arm adapter to fit your STI.
You will earn Reward Points with this Purchase.


The Slammer tips the scales at 615 grams and you feel every ounce of that weight while smoothly shifting from gear to gear. The mass of the Slammer helps redefine your shifting experience by allowing the weight of the knob to work in your favor while slamming gears.


Well, to put it as simply as we can, the heavier the knob, the easier it will make shifting feel. Its not magic, its physics. Weight in motion directly relates to how an object will react to an opposing force. In this case, the opposing force is the gate pattern and counter springs that are connected to your shift arm that tell you the shift pattern of your car. The difference felt when shifting into the next gear requires far less effort due to the additional momentum created by the increased mass.


A shift knob is one of the most touched accessories in the car, short of the steering wheel and pedals. We designed the Slammer to be just as aesthetically pleasing as it is to hold in the palm of your hand.

The shape of the Slammer is not the traditional ball shaped shift knob for a reason. The ergonomics behind an overhand grip shift position require a full form shape at the bottom and a flatter top shape to fill your palm. The combination of these elements drove the shape of the Slammer.


The Slammer is cnc machined from 303 stainless steel. Machining stainless steel is not an easy task. It requires close supervision of our cnc turning centers and tooling to ensure a flawless part and surface finish.



The Slammer shift knob will come with a billet aluminum threaded adapter with a M12 x 1.25mm thread to fit the shift knob to your STI shifter arm


A set screw is also included that allows you to easily adjust the orientation of the shift gate pattern and the height of the shift knob. Instructions are included to help you thru the installation process.



We design and develop our products in house! This capability allows us to create products like nothing you've ever seen or experienced. Our goal is to deliver products with a resounding sense of authenticity, where form and function fuel each other.


We manufacture our products in house! From cnc programming to machining production, our parts are made in house using our own manufacturing equipment. "Proudly made in the USA" may sound a bit cliche but that mantra is an integral part of the culture at Raceseng. Our joy lives in the process of crafting our own performance products.

2015 WRX Raceseng MT Slammer Shift Knobb
2015 STI Raceseng MT Slammer Shift Knob

People who viewed this item also viewed

3 customer reviews

Average rating
(based on 3 reviews)
Ease of Installation
Fit / Quality
Overall Satisfaction
  1. It's ok

    By chris October 8, 2020

    The shifter feels great in your hand as it is noticeably bigger than the stock knob. Does not really feel much different shifting gears vs the stock knob though. It looks nice aesthetically but I'm not sure it's worth the cost of the knob.

  2. Worth it

    By shane July 9, 2017

    Killer look and works great. The set screw makes it easy for the trial and error of installing it correctly so the gates line up perfectly. For me it seems to sit lower than the stock knob and almost makes the shifter seem shorter. This is also a good thing. I wasn't expecting that.

  3. Great Product

    By Todd February 26, 2015

    High quality product and feels great in your hand. Just the right weight to make shifting fun, and looks fantastic in the car. (I much prefer steel to all of those other colored and textured shift knobs) Using it in a Colorado winter, the knob does get a little cold.... it warms up quickly with use, though.

Write Your Own Review

Only registered users can write reviews. Please, log in or register


No questions have been asked about this product.

Upload images for this product