ADJUSTABLE MODULATOR

The Coan Racing COA‑12650 Adjustable Modulator is a precision-engineered vacuum modulator tailored specifically for GM Powerglide transmissions. This screw-adjustable unit allows users to fine-tune vacuum settings. Designed for direct replacement, the COA‑12650 preserves hydraulic integrity and responsiveness under diverse driving conditions.

Built to Coan’s stringent quality standards, the COA‑12650 is an ideal choice for performance-oriented Powerglide builds seeking better transmission control and consistency.