Edelbrock E-Series Cylinder Head Bolt Kit #85772 for 5.2L/5.9L MagnumEdelbrock E Series Cylinder Head Bolt Kit #85772 is a high quality replacement bolt set for Chrysler 5. 2L and 5. 9L Magnum engines equipped with Performer RPM #61779 and #61775 aluminum heads. This kit contains all necessary parts to replace the factory head bolts. E Series bolts have a yield tensile strength of 190,000 PSI for strong and reliable loading with generous filleting throughout to eliminate stress risers. Bolt threads are rolled after