New Edelbrock RPM Air-Gap Aluminum Intake Manifolds For AMC Like the rest of our RPM Air-Gap line, these new Edelbrock intake manifolds delivers outstanding performance from 1500 to 6500 rpm using the same "Air-Gap" technology incorporated into our race-winning Victor Series line. This unique design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge and more power throughout the rpm range. The Edelbrock Air-Gap design is a proven performer. The new RPM Air-Gap is available for 1970 & later AMC 304-401 c.i.d. engines in standard finish (#7531) and polished (#75311) as well as 1967-69 AMC 290-390 c.i.d. engines in standard finish (#7530). All RPM Air Gaps for AMC include standard oil fill and PCV provisions as well as early air conditioning support bracket accessory bosses for a straightforward installation. Download photo. Contact: Bill Groak, Pacific Communications Group (310) 224-4940 (bgroak@paccomgrp.com)