Home / Engine & Performance / Manley Valve Spring Seat, Spring CUP-ID 1.311 LT4 T “ARP GM DURAMAX 6.6L L5P CA625+ HEAD STUD KIT” has been added to your cart. View cart Manley Valve Spring Seat, Spring CUP-ID 1.311 LT4 T€ 63,14 Manley Valve Spring Seat, Spring CUP-ID 1.311 LT4 T quantity Add to cart SKU: 42148-8 Categories: Engine & Performance, Valves & Springs Brand: Manley Related products Engine & PerformanceTurbochargers Haltech Turbosmart GenV eWG50 Progate 50 Bolts & StudsEngine & Performance ARP cabinet with accessory bolts Engine & PerformanceTurbochargers Haltech Turbosmart GenV eWG45 Hypergate 45 Bolts & StudsEngine & Performance Chevy Duramax 6.6L diesel CA625+ custom age HSK