We've done it again! Another all-in, complete engine swap package for the K series, this time for the popular NC chassis (2006-2015 Mazda MX5, manual transmission only). Our initial run of these kits are scheduled to ship in June 2024. After the initial batch, lead times may be approximately 30-45 days depending on demand.

Thanks to the NC chassis coming from the factory with an four cylinder with the exhaust ports on the right side of the engine bay, the packaging on this K24 swap is the cleanest yet! Learn more about what makes this swap so special and refined in our blog post here. This swap retains the factory transmission and power steering system for an OEM level of refinement, with an optional A/C upgrade and more.

This package provides all aftermarket parts for a complete K24A2 conversion in your vehicle, including all of the required electronics. Just add an engine, some OEM parts, and some assembly time, and your NC will be transformed into the car it should have been from the factory.

At this time, we are not accepting any omissions or substitutions in this package aside from the drop-down menu options. If you’d like to build your own kit to meet your needs better, please check out our smaller NC packages, as well as individual parts listed on our site. 

Also, consider adding our NC-specific OEM parts package and sensor package to your swap.

This swap package includes the following products:

• K24 to NC manual transmission adapter plate (5 or 6-speed)
• K24 to NC aluminum flywheel, 12.5 lb.
• Tubular steel subframe, powder coated
• Steel engine mount brackets, powder coated, with hardware
• Cast aluminum KPower intake manifold
• IACV blockoff plate and hardware
• MAP sensor plug
• 74mm Bosch drive-by-wire throttle body
• Carbon/nylon 3D printed throttle body adapter with hardware
• 3” cold-air intake with filter
• NC hydraulic power steering kit
• 4-2-1 304 stainless steel race header
• KPower fuel rail
• Fuel line kit, E85 compatible
• Braided steel clutch line
• Upper coolant neck specifically designed for the NC chassis
• Hybrid Racing thermostat inlet plug (or upgrade to heater kit)
• Eccentric idler pulley, billet aluminum
• Accessory belt
• Haltech Elite 1500 ECU, with NC base calibration
• Haltech CAN wideband sensor and controller
• Motorsports grade engine wiring harness, 100% plug and play
• Chassis wiring adapter box
• ECU and wideband controller mounting bracket
• Bosch oil pressure and temperature sensor with adapter
• Alternator extension cable
• Optional A/C kit that utilizes factory NC compressor
• Optional heater kit
• Optional 3" race exhaust system
• Optional Exedy stage 1 clutch

Important Notes:

• All products are designed for off-road motorsports use only. Users are responsible for complying with all local laws in their county, state, and country.
• Our engine wiring harness is designed for 2004-2008 K24A sensors, including the crank sensor, knock sensor, and injectors. The A/C compressor connector is for a factory NC unit.
• If you plan on using injectors other than OEM K24A injectors, please specify at checkout and we’ll swap in the appropriate injector sub-harness free of charge. 
• These engine mounts fit the following engine blocks: K24A2, K24A3, K24A4, K24A8, K20Z3 and the JDM K24A. They do NOT fit K20A2, K20Z1, or K24A1 blocks due to incompatible bolt-hole locations on the left side of the block. Please make sure you source the correct block for your project.

Speed Academy Installation Tutorial: