.550" Lift Z28 RV Valve Springs Set for CHevrolet SBC 400 350 327 307 305 283 Engines
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.550" Lift Z28 RV Valve Springs Set for CHevrolet SBC 400 350 327 307 305 283 Engines
outside dia.: 1.260"
inside dia.: .785"
.550" max camshaft lift
Outside Diameter: 1.260" Inside Diameter: 0.785" Closed: 114 lbs. @ 1.710" Open: 318 lbs. @1.210" Coil Bind @: 1.160" Spring Type: Single with damper -fits small block chevy engines from 1955-1993. Good for towing, rv, and mild camshaft applications with lifts up to .550".