BLACK FRIDAY SALE: save $500 on this package now through 12/1!

This package is designed to install a 2004–2008 Acura TSX engine (K24A2 or JDM K24A RBB) into your NA or NB Miata, eliminating the guesswork and hassle of piecing together a swap from scratch.

Most customers see 220+ whp and 180 wtq naturally aspirated with a stock K24A2, with much greater potential available through bolt-ons and tuning. Whether you're building a street car or a track weapon, this package is built to perform.

Lead times vary. Be sure to check our Current Lead Times page for the most up-to-date shipping timelines.

This swap package prioritizes reliability and race-proven performance. When paired with the required accessories, our K24A2 swap:

• Retains OEM Miata steering geometry

• Reduces front-end weight

• Holds up to serious road course abuse

Pair this kit with one of our Electronics Packages to power your swap with a Haltech Elite 1500, Link G4X, or Hondata KPro.

Download installation instructions

Package Includes:

• K series to Miata transmission adapter plate

• Lightweight K series to Miata flywheel

• Machined engine mounts with poly or rubber pads

• Tubular subframe (replaces factory unit)

• Baffled aluminum oil pan with pickup tube

• Machined K20 oil pump adapter housing

• KPower RWD intake manifold with gasket and hardware

• K24A2-specific upper coolant neck (right side exit)

• Slim flywheel dust cover

• 1320mm serpentine belt

• Stainless 4-2-1 race header

Throttle Body Options (choose one):

• 74mm cable throttle body with billet cable wheel, Acuity TPS, and adapter
  OR

• Bosch 74mm Drive-by-Wire throttle body with adapter and gaskets

Additional Notes:

• NA Chassis Hood Clearance: The K24 sits about ½ inch taller than the K20 and will not fit under a factory NA Miata hood without modification. We recommend adding our modified valve cover for proper clearance.

• RHD Compatibility: This swap is compatible with right-hand-drive Miatas, excluding the header. For RHD setups, contact us at info@kpower.industries to discuss a custom solution using our RHD subframe.

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.

• These engine mounts bolt to the following engines: JDM K24A RBB, K24A2, K24A3, K24A4, K20Z3, K20Z4, and the less desirable K24A8. They do NOT fit K20A2, K20Z1, or K24A1 blocks due to incompatible bolt-hole locations on the left side of the block. These mounts can be used as a starting point however, read more about this topic in our blog.

KPower Recommended Supporting Parts:

• KPower Haltech Elite 1500 Electronics package (Drive By Wire)
• Link G4X ECU with KPower RWD Engine Harness and Miata Conversion harness (Drive By Cable)
  
  • Link CAN Gauge
  • Link CAN WBO2
  • Link CAN Splitter
  • Link CAN Connection Cable
• K24A2 Miata OEM Parts Package
• USDM Water Pump Housing
• K24A2 Engine Sensor Package
  
• Fluidampr Harmonic Balancer crankshaft pulley
• KPower Modified Baffle Plate Valve Cover
  • NA version
  • NB version
• KPower NA/NB Catch Can Kit
• Haltech CAN Gauge or iC-7 display
• NA/NB Electric Power Steering System
• NA/NB Air Conditioning system with wiring harness
• KPower DBW Pedal mount
• KPower Flex Fuel Kit
• Winning Formula DBW Throttle Body adapter (substitution for KPower adapter)