Feature 1OE Number: The referencing OE number of this pinless accumulator piston kit are 7799803K, 7798701K, S74927BK, S74927K. 2Fitment: The pinless forward accumulator piston kit is a replacement for 4L60E 4L65E 4L70E transmission, applicable for Forward 12, and 34, for Sonnax FWD 12 and 34. 3Improved Transmission Performance: The pinless accumulator piston kit helps improve shift quality, prevent slips and burnt clutches, bands caused by accumulator piston wear. 4Durable Design: The dual seals and pinless design eliminate the possibility of pin leakage, stabilizing the piston and preventing cocking for long lasting performance. 5Easy to Install: The kit is designed for easy installation, providing a hassle free solution for improving transmission normal operation and performance.Item Type:PinlessAccumulatorPistonKitOENumber:7799803K,7798701K,S74927BK,S74927KMaterial:AluminiumFitment:Fits for 4L60E 4L65E 4L70E Transmission Pinless AccumulatorsApplicable for Forward, 1-2, and 3-4 Accumulator Piston KitFits for Sonnax FWD 1-2 and 3-4 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x PinlessAccumulatorPistonKit (15 Pcs)NotePlease double check the part number of your item, matching information is for reference only.If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!