1.6 Miata Intake Manifold Coolant Blockoff

Maximize the 1.6 Miata’s performance by taking control of intake heat. The 1.6 Miata Intake Manifold Coolant Blockoff eliminates the stock coolant path that sends hot engine coolant toward the intake manifold, reducing heat soak and preserving power where you need it most—across the RPM range and during spirited driving.

The Blockoff is precision-cut from durable 5052 aluminum, ensuring a tight, reliable seal and lasting performance under race- or daily-driver use. It’s a straightforward, bolt-on upgrade that doesn’t require a complex install or a major engine teardown. When you properly manage the heat, you’ll notice crisper throttle response and more consistent power delivery as the intake air stays cooler longer.

Why this matters

Heat soaking is a common power limiter on Miatas. By stopping the transfer of hot coolant to the intake, you reduce intake air temperature, which helps the engine make more reliable power, especially during prolonged pulls or hot-day sessions. For enthusiasts pushing their 1.6L Miata on track or backroads, better intake temperature management translates to more repeatable performance.

Key features

• Precision-cut 5052 aluminum blockoff plate built for durability and a precise seal
• Subtle, bolt-on design that minimizes installation effort
• Includes 1x block-off plate and 4x M5 bolts for secure mounting
• Simple, repeatable install with common shop tools
• Lightweight solution that preserves engine bay space and routing options

Compatibility and usage

Designed specifically for the 1.6L Miata, this coolant blockoff is ideal for enthusiasts seeking to optimize heat management and throttle response without compromising coolant routing options. It’s compatible with the factory layout and works best when paired with a properly tuned ECU. A standalone ECU is recommended for optimal performance gains, allowing you to fine-tune fueling.

What’s included

• 1x 1.6 Miata Intake Manifold Coolant Blockoff plate
• 4x M5 mounting bolts

Installation guide

1. Remove the factory coolant block from the intake manifold
2. Clean the surface of the intake manifold to ensure a clean, flat sealing plane
3. Apply a thin, even bead of RTV silicone to the manifold surface to promote a leak-free seal
4. Install the block-off plate, aligning it with the mounting holes
5. Block off the unused coolant line or route it back to the water neck as desired
6. Enjoy the improved intake temperature management and throttle response

With the 1.6 Miata Intake Manifold Coolant Blockoff, you’re choosing a practical upgrade that targets a real constraint on NA Miatas: intake heat. Take control of your engine’s cooling strategy, unlock cooler air for combustion, and experience more responsive acceleration.