GSC Power-Division OEM Replacement Valve Spring Seat Set for 4G63T (gsc1004) StillenShipping_45 This is our ultimate transmission

This is our ultimate transmission kit - it comes complete with full instructions on how to assemble your transmission to B&M specifications

RD testing has shown this system flows up to 288 cfm more than the factory exhaust

AEM's Wideband UEGO (Universal Exhaust Gas Oxygen

Expanded 5-port body with one AN-10 inlet port plus four AN-08 outlet ports and one AN-10 return port

T2R-F01 race

GSC Power-Division OEM Replacement Valve Spring Seat Set for 4G63T (gsc1004) StillenShipping_45 This is our ultimate transmissionGSC Power Division OEM Replacement Valve Spring Seat Set for 4G63T. Perfect for replacing old seats when upgrading to a high performance spring kit like the GSC Beehives. Same thickness as OEM, so no spring pressure change when using these. Sold as a set of 16. Features: Made 100% in the US Designed to deliver trouble free, consistent performance Right for your vehicle and lifestyle Made from high quality materials for ultimate durability Manufactured