Home / Valves & Springs / Manley Valve Spring 1.437 DOUBLE “ARP GM DURAMAX 6.6L L5P CA625+ HEAD STUD KIT” has been added to your cart. View cart Manley Valve Spring 1.437 DOUBLE€ 296,45 Manley Valve Spring 1.437 DOUBLE quantity Add to cart SKU: 22407-16 Categories: Cylinder Head, Engine & Performance, Valves & Springs Brand: Manley Related products Engine & PerformanceEngine Block JE-Pistons Kit Lambo. Gallardo 5.0L FSI V10 ’03-08 82.50mm Bolts & StudsEngine & Performance ARP cabinet with SS hex accessory bolts Engine & PerformanceEngine Block JE-Pistons kit Ferrari 330 4.0L 24V 78.00mm 10.0:1 Engine & PerformanceTurbochargers Haltech Turbosmart GenV eWG60 Powergate 60