Because of its unique shape, the JS Motorsport Beehive Spring and Retainer kit is much lighter than any other stock or racing springs & retainers. The tapered diameter near the top helps tune out unwanted resonance, and thus eliminates the need for an inner spring while at the same time allowing for a smaller, lighter weight Titanium retainer. They come with either thin or thick spring bottom washers to set the spring tension for either street or racing. The thin street bottom washers are for matching stock street spring tension. The thicker racing spring bottom washers are for racing and give you the same spring tension as other popular racing springs but weigh only 1/2 as much - a win/win situation for street or racing - good insurance against unwanted valve/spring bounce and the horror of dropping a valve into your carefully prepared combustion chamber. I have personally tested these components beyond 8000RPM without a hint of valve float. See comparison details below.

Note: The valve tip above right is supplied with a higher cut in order to provide the correct spring pressure rate and avoid coil binding. You cannot use stock valve tips with these springs. Instructions are included and explain how to set up spring tension for either racing or street use. Our black diamond valves come with stellite tips and do not need lash caps. 1.5mm oversize valves are the same price but you must have re-angled guides to avoid valve clash. Note spring cup and adjustment shims in photo below. You can use your original split collets.

A JS Motorsport Beehive Spring Kit installed with the provided bottom spring washer for street use will have the same spring tension as stock springs that are ideally shimmed to .060" from coil bind with a stock performance type cam. In this configuration the beehive spring will have an installed height of 1.450" with approx .220' coil bind clearance with stock performance type JS0 cam.

Note that the extra coil bind clearance allows the Beehive Springs to be used on the street at stock tension with street type bottom washers. Or they can be used on the track with thicker racing type bottom washers and increased tension as described below.

If you just want to buy the springs and modify your existing valves to fit (see diagram).

A JS Motorsport Beehive Spring Kit installed with a racing cam of .400" lobe lift and shimmed to .060" from coil bind will have about 5lbs more tension at peak pressure than other racing springs (RD brand shimmed to .060" from coil bind). In this configuration the Beehive Spring will have an installed height of approx1.350".

Note that heavy dual springs are the primary cause of "valve bounce" because the inertia of a heavy spring causes it to keep springing up and down even after the valve has slammed against its seat. See valve bounce video.