2004 Mazdaspeed Miata With Honda K24 Engine Swap Isn't Your Average MX-5 22 Dec 2020, 12:47 UTC · by For the 2004 and 2005 model years, the Mazdaspeed Miata showed the world how forced induction can make the MX-5 more fun than it already is. An IHI turbocharger and 1.8 liters of displacement translate to 178 horsepower, three ponies down on the 2.0-liter engine we have today. 45 photos The Mazdaspeed Miata also happens to be a scarce breed at 5,428 units produced for the United States market, but despite the rarity, a wonderful madman yanked out the original powerplant in favor of the Ultimate K24A2 Miata Swap Package. Available to order from $5,549 from KPower Industries, this upgrade revolves around the 2.4-liter mill of the Acura TSX.