Deltron BK test spring kit comes with 2 pieces of Part No.DEL- FTS48-2. Works well for V8 engines with valve spring installed height of 1.700″-1.900″ also 2 pieces of Part No.DEL- FTS45-2 these work well for small engines with valve spring installed height 1.500″-1.800″.You can also install the small spring inside the larger one making double spring setup for more closed pressure if you are testing at higher test pressures 36″ inches of water. Replace stock factory springs with these lighter test springs . 4 pc kit. Please e-mail us if you have any questions.
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