3mirrors 67605 Valve Spring Compressor Tool and Cylinder Leakage Testing Assistant Tool

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We have upgraded the nuts and made them higher to enhance stability. Bolts and nuts Kit built from 3/8" Steel and CNC machined for a great fit and Durability. Performance levels are 10.9, 10.9 and 12.9, much better than the other 8.8. OE 67605, will be compatible with 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LS3 LS6 Chevy LSX Camaro, Corvette, Trans am, GTO, G8, CTS V, GM Trucks This tool kit is for 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LS3 LS6 LS Engines and is a must when it comes time to install a new set of valve springs! This Air Tool Hose kit work when replacing valve springs or valve stem seals, pressurizing the cylinder to help hold valves closed with compressed air. Pump comes with M10 M12 M14 M18 Threads to NPT with ball valve air pump quick connector, the inner hole is a 1/4NPT threaded interface. 14mm is the standard spark plug size for most vehicles.