GReddy Heritage

Before discussing the knob itself, it’s worth understanding the name behind it.

GReddy has been producing performance parts since the tuner boom of the 1980s and 1990s.

The company is known for:

• Turbo kits
• Exhaust systems
• Intercoolers
• Electronic controllers
• Engine management systems
• Drivetrain components

This shift knob traces its roots directly back to GReddy’s motorsports heritage.

Diamond-Shaped Billet Aluminum Design

The standout feature is the unique diamond profile.

Unlike traditional spherical shift knobs, the diamond shape provides:

• Improved grip
• Better palm support
• Enhanced shifting precision
• Unique JDM appearance

The shape works particularly well for both:

Side Grip Shifting

Popular during spirited driving.

Overhand Shifting

Common during daily driving and track use.

CNC-Machined Aluminum Construction

Material

• Billet Aluminum

Benefits include:

• Excellent durability
• Precise machining
• Premium feel
• Long service life

Unlike plastic factory knobs, aluminum provides a more connected and mechanical shifting experience.

Polished Finish

The polished aluminum surface gives the knob a classic tuner-car appearance.

Perfect for:

• JDM builds
• Time attack cars
• Street cars
• Show cars
• Period-correct 1990s builds

It looks especially at home in vehicles equipped with:

• Bride seats
• Nardi wheels
• Defi gauges
• GReddy electronics

Adjustable Mounting Height

One of the most useful features is its adjustable height system.

A01 High Type

The knob sits higher above the shift lever than standard designs.

Adjustable Range

• Approximately 30 mm

The included:

• Jam nut
• 8 mm Allen wrench

allow drivers to fine-tune knob position for their preferred ergonomics.

Why Shift Knob Height Matters

Changing shift knob height affects:

Shift Feel

Higher knobs often provide smoother leverage.

Comfort

Allows customization based on driver preference.

Reach

Can reduce arm movement during shifts.

Driving Style

Some drivers prefer shorter throws while others prefer a taller, rally-inspired feel.

The adjustable design lets you experiment without purchasing multiple knobs.

Included Thread Adapters

GReddy includes three threaded adapters covering many popular import platforms.

M10 x 1.25

Fits most:

• Nissan
• Infiniti
• Mitsubishi
• Mazda

M10 x 1.5

Fits most:

• Honda
• Acura

M12 x 1.25

Fits most:

• Toyota
• Lexus
• Scion
• Subaru

This broad compatibility makes the knob suitable for a huge range of enthusiast vehicles.

Weight and Shifting Feel

Weight

• Approximately 197-203 grams

A slightly heavier shift knob can:

• Improve shift smoothness
• Reduce notchiness
• Increase shift momentum
• Enhance overall shift feel

Many enthusiasts prefer weighted knobs because they help guide the transmission through gear changes more naturally.

Ideal Vehicle Applications

Honda

• Civic Si
• Integra
• RSX
• S2000

Nissan

• 240SX
• 350Z
• 370Z
• Skyline

Subaru

• WRX
• STI
• BRZ

Toyota

• Supra
• GR86
• Corolla GR

Mitsubishi

• Evo VIII
• Evo IX
• Evo X

Included Accessories

The package includes:

• GReddy Aluminum Diamond Shift Knob
• Three Thread Adapters
• Jam Nut
• 8 mm Allen Wrench
• GReddy Shifter Stickers

Everything needed for installation is included.

Pros and Cons

Pros

• Authentic GReddy design
• Billet aluminum construction
• Adjustable mounting height
• Multiple thread adapters included
• Excellent shift feel
• Classic JDM styling
• Weighted design improves engagement

Cons

• Aluminum can become hot or cold with weather changes
• Not compatible with every reverse lockout system
• Premium pricing compared to generic shift knobs

Frequently Asked Questions

Will this fit a Honda Civic?

Yes. The included M10 x 1.5 adapter fits most Honda and Acura manual transmissions.

Does it work on a WRX?

Most Subaru manual transmissions use the included M12 x 1.25 adapter.

Why choose a weighted shift knob?

Additional mass often improves shift smoothness and reduces the effort needed to engage gears.

Is the height adjustable?

Yes. The A01 High Type allows approximately 30 mm of adjustment.

Final Thoughts

The GReddy 14500571 Aluminum Diamond Shift Knob A01 High Type is one of those rare upgrades that improves the driving experience every time you get behind the wheel. Combining classic JDM heritage, billet aluminum construction, adjustable height, and broad compatibility, it’s an excellent choice for enthusiasts looking to add both style and functionality to their manual transmission vehicle.

Because adding horsepower is fun—but actually enjoying every gear change is something you’ll notice every single day.

Includes shifter stickers