Vehicle Compatibility

Mazda MX-5 Miata NA

• 1990 Mazda Miata
• 1991 Mazda Miata
• 1992 Mazda Miata
• 1993 Mazda Miata
• 1994 Mazda Miata
• 1995 Mazda Miata
• 1996 Mazda Miata
• 1997 Mazda Miata

Mazda MX-5 Miata NB

• 1999 Mazda Miata
• 2000 Mazda Miata
• 2001 Mazda Miata
• 2002 Mazda Miata
• 2003 Mazda Miata
• 2004 Mazda Miata
• 2005 Mazda Miata

Transmission Compatibility

✅ NA 5-Speed Manual

✅ NB 5-Speed Manual

✅ NB1 6-Speed Manual

❌ Automatic Transmission Models

The shifter is compatible with standard H-pattern Miata gearboxes while maintaining the factory coupling system.

What Makes This Shifter Different?

Unlike a conventional short shifter, this is a complete billet shifter box assembly.

Benefits include:

• Extremely short throws
• Improved gear engagement
• Elevated shift position
• Enhanced precision
• Motorsport-inspired feel

The design focuses on maximizing driver control while retaining the reliability of the factory transmission setup.

Premium Billet Construction

The Bull Boost shifter utilizes high-quality materials throughout.

Features include:

• CNC-machined aluminum frame
• High-grade aluminum shift lever
• Stainless steel hardware
• Teflon-coated sliding inserts
• Precision-machined bearing assemblies

These materials help deliver long-term durability while maintaining smooth operation.

Faster and More Accurate Shifts

The primary purpose of the shifter is to improve shifting speed and precision.

Drivers often notice:

• Reduced shift travel
• Faster gear changes
• More direct engagement
• Improved gate definition

The gearbox feels significantly more mechanical and connected.

Bearings Improve Shift Feel

Unlike many budget shifters, this design incorporates bearings that facilitate both rotational and angular movement.

Benefits include:

• Smoother operation
• Reduced friction
• Increased precision
• Consistent performance

The result is a more refined performance shifter.

Elevated Shifter Position

One of the most popular features is the taller shifter placement.

Advantages include:

• Reduced reach distance
• Faster shifts
• Better ergonomics
• Easier access during performance driving

By positioning the lever closer to the steering wheel, the driver spends less time moving their hand away from vehicle control.

Performance manual short shifter Fast & accurate quick shift Bearings that facilitate angular and rotational movements of the stick Premium materials: -Prime-grade aluminum stick and frame -Stainless-steel bolts -Teflon-coated sliding inserts -Precisely CNC milled aluminum anodized in black, black gold, or red Complementary finish The gear lever is longer and situated closer to the steering wheel for faster and more convenient shifting For optimal

Perfect for Autocross and Track Use

The Miata is a favorite motorsports platform.

This shifter works exceptionally well for:

Autocross

• Faster transitions
• Reduced shift times

Road Racing

• Improved consistency
• Better confidence under load

Canyon Driving

• Enhanced driver engagement
• Quicker gear selection

Street Builds

• More enjoyable daily driving experience

Recommended Supporting Modifications

Bull Boost recommends checking engine mounts before installation.

Upgrades that pair well include:

• Performance engine mounts
• Transmission mounts
• Polyurethane bushings
• Lightweight flywheels
• Performance clutches

These supporting modifications help maximize overall shift quality.

Installation Considerations

Before installation:

• Verify gearbox compatibility
• Inspect transmission bushings
• Check engine mount condition
• Confirm turret dimensions

For reference:

NA/NB 5-Speed & NB1 6-Speed

• Shaft Tip Diameter: 15mm
• Turret Hole Diameter: 19mm

Always verify measurements before ordering.

Pros and Cons

Pros

• Extremely short and precise shifts
• Premium billet construction
• Bearings improve shift quality
• Elevated shifter placement
• Maintains factory linkage system
• Excellent for motorsports use

Cons

• More aggressive than stock
• Installation required
• Increased transmission noise possible
• Premium pricing compared to basic short shifters

Frequently Asked Questions

Does this fit all NA Miatas?

Yes. NA Miata 5-speed manual transmission models are supported.

Will it fit an NB Miata 6-speed?

Yes. NB1 6-speed gearboxes are compatible.

Does it modify factory linkage?

No. The factory coupling system remains unchanged.

Is it suitable for track use?

Absolutely. Its design is heavily focused on performance driving and motorsports applications.

Final Thoughts

The Bull Boost Performance Billet Short Shifter Box is one of the most aggressive and performance-oriented shifting upgrades available for the Mazda MX-5 Miata. With premium materials, bearing-supported movement, shorter throws, and a raised lever position, it delivers the type of shift feel many enthusiasts associate with dedicated race cars.

Because if a Miata’s entire purpose is maximizing driving enjoyment, there’s no reason your shifter should settle for anything less than perfection.