Designed for street 289-302 c.i.d. Ford V8s, the RPM Air-Gap incorporates the same race-winning technology thatıs been used on the Victor Series competition intakes for years. The Air-Gap design results in a cooler, denser charge for more power. The open air space separates the runners from the hot engine oil. As a result, the air/fuel mixture stays cooler. This cooler charge creates more power. Includes nitrous bosses. No provision for exhaust heated chokes and no exhaust crossover. Installation Notes: Will not fit 255 c.i.d. V8.