Upgrade Shift Feel with a Weighted, Grippy Aluminum Knob
Factory shift knobs are often light, slippery, and short on personality. The GrimmSpeed Tallboy Shift Knob is machined from aluminum and finished in black anodizing, with a tall-boy profile that sits comfortably in hand and adds a bit of weight for more direct shift feel. Built with an M12x1.25 thread pitch, it threads onto most Subaru WRX and STI shifters as well as many other Japanese vehicles sharing that same thread standard.
Key Features
- Machined aluminum construction for durability and added heft
- Black anodized finish resists wear and corrosion
- Tall-boy profile designed for comfortable hand placement
- M12x1.25 thread pitch fits most Subaru WRX/STI and other compatible Japanese vehicles
- Simple thread-on installation with no special tools required
Specifications
| Detail | Value |
|---|---|
| Brand | GrimmSpeed |
| Part Number | GRM380007 |
| Material | Aluminum |
| Finish | Black Anodized |
| Thread Pitch | M12x1.25 |
| Profile | Tallboy |
What’s Included
- GrimmSpeed Tallboy Shift Knob, black
- Thread adapter(s) if required for specific thread pitches
About GrimmSpeed
GrimmSpeed builds performance and styling parts primarily for Subaru enthusiasts, offering interior upgrades like this shift knob alongside its engine and chassis components.
Related Parts on Our Site
- GrimmSpeed Tallboy Shift Knob Aluminum Red – M12x1.25
- GrimmSpeed Stubby Shift Knob Black Delrin – M12x1.25
FAQ
What is the GrimmSpeed Tallboy Shift Knob?
It’s an aluminum shift knob with a tall-boy profile and black anodized finish, built with an M12x1.25 thread pitch to fit most Subaru WRX and STI shifters and other compatible Japanese vehicles.
Will this fit my automatic transmission Subaru?
This knob is designed for manual transmission shifters using the M12x1.25 thread standard; it is not intended for automatic shifters.
How do I know if my thread pitch matches?
Most Subaru WRX and STI manual shifters use M12x1.25 threads; if you’re unsure, measure your factory knob’s threading or check your vehicle’s specifications.
Does it come with thread adapters?
Some GrimmSpeed shift knobs include adapters for compatible non-M12x1.25 applications; check the included hardware for your specific vehicle.
Is the black finish paint or anodized?
It’s a black anodized finish, which is more durable and resistant to wear than paint.
Will this knob get hot in direct sunlight?
Aluminum knobs can conduct heat, so it may feel warmer than a plastic knob when parked in direct sun.
Is installation reversible?
Yes, it threads on and off just like the factory shift knob.
Does the weight of this knob affect shift feel?
Yes, the added weight of the aluminum construction can contribute to a more deliberate, direct shifting feel.
Install Instructions
- Park the vehicle and engage the parking brake
- Unthread the factory shift knob counterclockwise to remove it
- Confirm the shifter thread pitch matches M12x1.25 or use the appropriate adapter
- Thread the GrimmSpeed Tallboy Shift Knob onto the shifter clockwise until snug
- Verify the knob is secure before driving
