Raceseng Gloss Finish Slammer Shift Knob

2015+ WRX / 2015+ STI


SKU: 11XX-08013-081102-PARENT


635 grams. That's the number you need to remember. The Slammer is exactly what the name entails. The shape and mass of this shift knob makes for one of the most enjoyable shifting experiences. The Slammer is reverse lockout compatible and custom made to fit your STI 04-15+ or WRX 15+. The unique mirror powder coat finish is gorgeous! Custom shift gate engraving usually take 2 weeks to make, but we have many of them in stock!
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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.

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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.


1.4 lbs. | 635 grams


2 5/16" | 58.9 mm


2 1/16" | 52.4 mm


With the weight in all the right places, Ashiko redefines your shifting experience through the look and feel of how you shift into gear. You will experience smoother and faster shifts!


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.


The mirror finish is achieved thru a meticulous powder coating process which includes multiple stages of careful hand work. The shift knobs come off our cnc machines with a super smooth surface finish, then they are gently glass beaded to promote powder coating adhesion. A smooth coat of electrostatically charged powder is applied and then the shift knob is precisely baked at a specific temperature to create a super smooth and durable finish!



The Ashiko comes with a billet aluminum threaded adapter and threaded lock nut with a M12 x 1.25 thread to fit the shift knob to your vehicle.

When installed, the threaded adapter kit allows you to adjust the height and orientation of the shift knob with ease.


The finishing touch on the Slammer is our optional shift gate pattern engraving. After the Slammer is powder coated, we put it back into our CNC machine to engrave the shift gate pattern. The stainless steel shows thru the powder coating which makes your shift gate pattern pop!

1 customer review

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(based on 1 review)
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  1. So impressed.....

    By Josh April 17, 2017

    I was skeptical at first. It is a lot of money for a shift knob but I have had it for a while now and do not regret the purchase what-so-ever. Exactly the opposite, I wish I would of purchased sooner. Install can be done in less than 5 min and it sits perfectly flush with the reverse lockout like the stock. The weight ans SIZE of this shift knob is perfect for my hands. I am 6'4 and have rather large hands and the best way to describe its size is 20-30% bigger than the stock. It is larger. Also I live in Arizona and this knob doesn't get very hot. I was worried about it getting so hot it would be scalding here in the desert but nope. It also just makes shifting more fluid/enjoyable/easier/ ect/ect. Again I wish I would of purchased sooner.

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