Out of Stock
These new Hi Tension valve springs pass all 2013 technical specifications and provide significantly more nose pressure for extended periods on engines turning 6100+ RPM than all other AKRA legal springs. They are made from a new material that does a far better job of resisting spring tension loss when the springs are consistently compressed to solid height (aka excessive valve float). If you are running a blue plate or an unrestricted box stock class engine, these springs are the new standard for "legal" box stock springs. Sold as a pair.