Outopakkle AC Compressor Adapter for LS GM R4 — CNC 6061-T6 Billet, #8/#10 Straight

Outopakkle's AC Compressor Adapter for LS GM R4 is a CNC-machined 6061-T6 billet aluminum straight adapter that converts the GM R4 compressor port to dual male #8 (3/4-16) and #10 (7/8-14) A/C line fittings with bolt-on clearance for a no-mod install.

This precision adapter block is made from durable 6061-T6 billet aluminum and surfaced by CNC machining to deliver accurate thread fits and a clean finish. It was engineered to mate directly with GM R4-type A/C compressors commonly used on LS engines, simplifying plumbing when converting to aftermarket lines or re-routing factory hoses. The design prioritizes fitment and serviceability while keeping the installation straightforward for experienced DIYers and professional installers.

How does this adapter fit GM R4 compressors?

The Outopakkle adapter is milled to match the GM R4 compressor port geometry and provides the correct clearance to install without altering your compressor. Threads, port spacing, and sealing faces are CNC-machined to the dimensions required for a direct bolt-on application on compatible R4 housings.

• Precise 6061-T6 billet construction for stable sealing surfaces
• Threaded outputs: #8 (3/4-16) and #10 (7/8-14) male fittings
• Engineered port spacing to avoid interference with compressor components
• CNC finish reduces need for additional fitment work

What materials and finish are used, and why do they matter?

The adapter is machined from 6061-T6 billet aluminum, chosen for its strength-to-weight ratio, corrosion resistance, and machinability. The CNC-machined surface produces accurate thread forms and flat sealing faces, which help ensure leak-free connections when installed with proper seals and torque.

• 6061-T6 alloy resists corrosion in an automotive environment
• CNC machining provides consistent thread and port tolerances
• Lightweight compared with cast alternatives for reduced stress on fittings
• Smooth finish helps compress and seat O-rings or gaskets reliably

Which lines and fittings does this adapter convert to?

This adapter routes the GM R4 compressor outlets to two male A/C line fittings: #8 (3/4-16) and #10 (7/8-14). That lets you attach common aftermarket or replacement A/C hoses and hard lines that use those standard sizes without further adapters.

• Outputs: one #8 (3/4-16) male fitting
• Outputs: one #10 (7/8-14) male fitting
• Straight adapter block simplifies hose routing in tight engine bays
• Designed for use with compatible O-rings or sealing hardware

Does the product include support or warranty service?

Outopakkle provides warranty service for this adapter; customer support is available if you encounter fitment or product issues. Keep purchase information and photos of the installed part handy when contacting support to speed troubleshooting.

• Manufacturer warranty coverage included
• Support available for fitment guidance and claims
• Recommend documenting serial/part and installation photos
• Typical assistance covers material or machining defects

Who is this for: This CNC billet adapter is intended for automotive technicians, hot-rodders, and LS-swap builders who need a reliable, high-quality way to convert a GM R4 compressor port to common aftermarket A/C line sizes. It's best suited to users comfortable with A/C system plumbing and standard torque/sealing practices; if you plan to service refrigerant-containing systems, pair this part with a certified A/C technician for safe evacuation and charging.