Eiahonen LS Drive-By-Cable Throttle Body Adapter Kit — 3-bolt to 4-bolt, T6 CNC Aluminum, fits up to 75mm

The Eiahonen LS Drive By Cable Throttle Body Adapter Kit lets you mount a 3-bolt DBC LS throttle body onto a 4-bolt LS intake quickly and securely.

If you need to pair a drive-by-cable (DBC) throttle body—commonly found as a 3-bolt pattern—with a 4-bolt LS intake manifold (for example LS2 or LS3 style), this adapter provides a precision-machined interface that keeps fitment tight and reliable. Constructed from T6 aluminum and CNC machined, the adapter balances strength and light weight for long-term use in engine bays where clearance and durability matter.

How does this adapter enable different throttle bodies to fit my LS intake?

The adapter serves as a mechanical bridge between differing bolt patterns and bore sizes, allowing a 3-bolt drive-by-cable throttle body to bolt to a 4-bolt intake manifold. It keeps the throttle bore aligned and seals the mating surfaces when installed correctly.

• Converts 3-bolt DBC throttle bodies to 4-bolt LS intakes.
• Compatible with throttle bodies up to 75mm in diameter.
• Designed for intake manifolds up to 92mm bore sizes.
• Not compatible with LS4 intakes or native 3-bolt DBW (drive-by-wire) throttle bodies.

What materials and machining processes are used, and why do they matter?

Made from T6-grade aluminum and CNC machined, the adapter delivers a high-strength, corrosion-resistant part with accurate bolt-hole alignment and a smooth bore. Those qualities reduce the risk of air leaks and uneven throttle mounting under heat and vibration.

• T6 aluminum for improved tensile strength and lightness.
• CNC machining for precise bolt pattern and bore concentricity.
• Durable finish to withstand engine-bay conditions.

Which throttle bodies and intakes will this kit work with?

This adapter is intended for 3-bolt drive-by-cable LS throttle bodies up to 75mm and 4-bolt intake manifolds up to 92mm. It is commonly used when swapping LS2/LS3 style intakes to accept older DBC throttle assemblies.

• Works with many LS2 and LS3 intake manifolds (4-bolt).
• Accepts 3-bolt DBC throttle bodies (check diameter, max 75mm).
• Does not fit LS4 intake manifolds or 3-bolt DBW throttle bodies.

Are there installation tips or precautions I should know?

Proper bolt torque and surface cleanliness are essential to prevent vacuum leaks or misalignment. When fitting to an LS3 4-bolt intake, tighten retaining bolts evenly and follow torque specs to achieve a consistent seal between throttle body and intake.

• Clean mating surfaces before assembly to ensure seal integrity.
• Tighten bolts evenly to manufacturer torque specifications.
• Confirm throttle bore alignment and smooth throttle plate operation after install.
• Verify compatibility of your specific throttle body diameter and intake model before purchase.

Who is this for: The Eiahonen LS Drive By Cable Throttle Body Adapter Kit is aimed at DIY engine builders, LS swap enthusiasts, and performance shops that need a reliable, lightweight solution to mate older drive-by-cable throttle bodies to newer 4-bolt LS intakes. If you are adapting a 3-bolt DBC throttle body up to 75mm onto a 4-bolt LS2/LS3 intake and want a precision, long-lasting connection, this kit is a practical choice. If your project uses an LS4 intake or a 3-bolt drive-by-wire throttle body, look for a compatibility-specific alternative.