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-408WCandGM-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-488andGM-RK-488WC.