The 13B-REW fits easily in the Miata's engine bay. Rampage Racing's impressive handiwork made the swap appear OE. Engine management duties are conducted by a Haltech E6K system. The rotary powerplant, scavenged from a 1995 RX-7, was street ported and converted to single-turbo duty. Rampage fabricated a single-turbo manifold from stainless steel to locate a HKS T04S turbo.