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Sonnax pilot GM-PI-21 comes standard in the following 4L60-series Sonnax performance converter kits: GM-RK-405, GM-RK-405WC, GM-RK-408, GM-RK-408WC and GM-RK-17.
The pilot also adapts the following 4L80-series Sonnax performance converter kits to late LS engines: GM-RK-485, GM-RK-485WC, GM-RK-488 and GM-RK-488WC.