Home / Engine & Performance / Manley Valve Spring Seat, Spring CUP-OD 1.625 “ARP GM DURAMAX 6.6L L5P CA625+ HEAD STUD KIT” has been added to your cart. View cart Manley Valve Spring Seat, Spring CUP-OD 1.625€ 126,28 Manley Valve Spring Seat, Spring CUP-OD 1.625 quantity Add to cart SKU: 42121-16 Categories: Cylinder Head, Engine & Performance, Valves & Springs Brand: Manley Related products Bolts & StudsEngine & Performance ARP cabinet with black hex accessory bolts Bolts & StudsEngine & Performance Chevy Duramax 6.6L diesel CA625+ custom age HSK Bolts & StudsEngine & Performance ARP cabinet with SS hex accessory bolts Engine & PerformanceEngine Block JE-Pistons kit R8 5.2L V10 ’09+ 84.50mm 9.0:1