Raceseng Slammer Texture Shift Knob

2015+ WRX / 2015+ STI


SKU: 11XXE-08113-081102-PARENTWe price match!


A union of mass and ergonomics. The Slammer is exactly what the name entails, the shape and 635 grams of mass makes for one of the most enjoyable shifting experiences. The finishing touch is a powder coat finish with a subtle texture for enhanced grip. Available in your choice of black, graphite or red. The Slammer comes with an adapter that will seamlessly mount it on your car's shifter arm with OEM fit and finish.
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Part of our Mass Series collection, the Slammer is weighted for performance shifting. The utilization of stainless steel creates a shift knob with mass to smooth out notchy shifting.

Photography taken in Toyota 86. The black reverse lockout is not included.


COLLECTION | Mass Series

PROFILE | Low Profile Sphere

FINISH | Low Gloss Texture Powder Coat

OPTIONS | CNC Machined Shift Gate Engraving

MATERIAL | 303 Stainless Steel + 6061 Billet Aluminum Adapter


WEIGHT | 1.4 lbs. - 635 grams

HEIGHT | 2 5/16" - 59 mm

DIAMETER | 2 1/16" - 52 mm

COUNTERBORED | For Reverse Lockouts and Shift Boot Retainer


The texture finish is achieved through 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 coat of electrostatically charged powder is applied, then baked to cure the powder which creates a subtle textured finish for a confident shifting grip.


With or without? All depends on your personal preference. Our signature shift gate engraving was designed to be graphically clean while giving your shift knob a unique aesthetic.

The engraving is cnc machined into the shift knob using a small .0625" solid carbide ball end mill.


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

How? 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.


We take fitment seriously. The Slammer comes with a precision cnc machined adapter that will fit your car's threaded shifter arm with OEM fit and finish. The adapter requires simple steps to install and allows you to adjust the shift gate engraving orientation with ease.


We specifically designed the Slammer to fit medium to x-large size hands.

Side Arm

Angled Overhand

Full Overhand


Shifting Positions

The Slammer was designed for multiple shifting positions including side arm, full overhand, angled overhand and overhand shifting positions. To make a shift knob work for all of these positions, the shape of the Slammer is not the traditional ball shaped shift knob. The proper ergonomics behind these shifting positions required a unique shape, one with a diminishing side profile, full form shape at the bottom and a flatter top shape to fill your palm.

Design Driver

We believe in the power of the design process to create incredible products. Every shift knob start it's life as an idea that is translated into countless ideation sketches where form and details evolve. We take those sketches and further develop them in solid modeling software to define the form and ergonomics of the shift knob. The goal of this process is to perfect the balance between form and function to create an unparallelled product and brand experience.

Crafted By Us

For the integrity and craftsmanship of our products, we do our manufacturing in house. We are proud to get our hands dirty crafting the very products we create.

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2 customer reviews

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(based on 2 reviews)
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  1. Enjoying

    By Nathan December 1, 2018

    I first purchased the Cobb light weight shift knob for price and looks. I like the shifting experience with the raceseng so much more. The raceseng is a much heavier knob and much larger. If it's price your debating go for the slammer it shifts so much better and looks good too. I like the textured feel. As well over the smooth of the Cobb. Buy this one! I personally did not have to adjust the set screw btw.

  2. Worth the money

    By Alex July 28, 2018

    I recently installed the Boomba plate and Tourque Solutions bushing. This shift knob added to more positive feel when shifting. With the added weight (appx a ful lbs over my stock STI shift knob) the lever just slides into gear and gives more confidence when shifting with, especially when shifting aggressively. The adapter sleeve included in this kit made the adjustment really simple to align the gate pattern. Mine came as a one piece construction so all I had to do was orient the Allen bolt at the desired height and it was right on. LOVE IT!

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