The heart of the MAZDASPEED MX-5 Miata is the fully integrated IHI turbocharger with 8.5 psig boost, combined with a Denso tube-fin air-to-air intercooler, all showcased with a red wrinkle-finish valve cover. Add a retuned exhaust, a modified head and camshaft, and beefed-up cooling and engine mounting systems, and the overall package results in 178 hp and 166 lb-ft of torque. The legendary Miata 6-speed gear box has been massaged with new gear ratios, a stronger clutch and propeller shaft, and a shot-peened treatment to the linkage for even more precise shifting.