MODULATOR PLUG, FITS COAN BILLET ALUMINUM VALVE BODIES
The Coan Racing COA‑22045A Modulator Plug is a high-quality service part designed specifically for Coan’s billet aluminum TH400 valve bodies. Machined in the USA to precise specifications, this plug replaces the modulator valve port and ensures a clean, leak-free seal within the billet body.
By restoring proper hydraulic modulation control, the COA‑22045A helps maintain stable line pressure and shift quality, serving as an essential maintenance item for valve bodies upgraded for trans-brake or high-performance operation, and ensuring reliable fluid integrity during intense use.
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