Over its previous three generations, ROADSTER/MX-5 has been delivered to over one million owners and remained a 2-seater sports car that admired around the world.
The new ROADSTER/MX-5, which has been designed aiming to be "Jinba Ittai" (Driver and vehicle as one), is much lighter than the previous generation. The light body is able to provide better driving feeling and exhilarating acceleration.
HKS has begun development of the exhaust part and suspension that will brings out the quality of the vehicle itself to provide better driving feeling.
HKS is foreseeing needs for the advanced tuning of this vehicle, and we will provide products that realize comfortable sports driving.

  • Extreme Low Exhaust Pressure Design for Supercharger/Turbo Tuning

    High exhaust efficiency is provided by the low exhaust pressure appropriate for supercharger and turbocharger tuning. The low-speed torque is improved, and high-speed torque can be improved with ECU ReFlash tool.
    Natural sound liaison while shifting from low to high speed range induces acceleration.
    Its comfortable & enjoyable exhaust sound may be loud, but it is appropriate level for street driving.


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  • The standard sports muffler creates the exciting sound and provides comfortability of daily driving.

    The stock exhaust tips appear to be floating due to wide clearances between the tip and bumper and the size of the notch on the bumper. The 70mm dual exhaust tips on this product are well-balanced with the bumper notch, and the black chrome tips create a striking impression from the rear. Adding a little sound pressure to the original exhaust sound recreates the sporty sound quality making both daily driving and driving on winding roads enjoyable. Its moderate low-tone enhances the exhaust system's presence and the higher-tones imparting an elevated feeling to the driver.

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  • Experience the evolution of improved stability and comfort

    Based on the existing MAXIV GT, this suspension improved comfortability is balanced with handling performance as far as a body rigidity, thanks to increased damping force on a bump side and limited rebound.

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  • Next generation suspension with high controllability for sporty driving and improved ride quality for street driving.

    Refined low-stance is created while maintaining the factory's supple ride feeling. This product provides a great ride quality not only for those who enjoy street driving but also circuit driving.

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  • Sports suspension with high controllability for sporty driving and improved ride quality for street driving.

    This product provides enthusiastic driving in winding roads. The best spring rate and dampening force were chosen for better handling under sports driving and upgrading the factory setting.

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  • GT2 Supercharger Pro kit

    This supercharger kit for MX-5 includes Full piping and intercooler, supercharger assy and mounting bracket, spark plugs 50003-M45HL, suction pipe and power flow air intake, cold air intake box with sound isolation, traction fluid, traction fluid cooler and washer fluid tank for relocation. Driving experience which is in line with the manufacturers original concept for the car: "Jinba Ittai" (THE ONENESS OF HORSE AND RIDER)

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  • ECU ReFlash tool available for tuning beginners and professionals.

    FLASH EDITOR optimizes the valve timing, electric throttle function, and boost pressure to improve response between the low rpm to high rpm.
    * Only for JDM

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  • Multi-purpose Bluetooth device compatible with both Android and iOS.

    OB-LINK extracts vehicle data from the on board diagnostics port (OBD) and sends it via Bluetooth to an Android device (Tablet/Smartphone etc.)

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  • New concept oil filter improves oil pressure drop and flow properties.

    The oil pressure drop and flow properties are improved approximately by 30% compared to current sports oil filters. The stress on the engine is reduced for better engine response.

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  • High qualtiy radiator cap with HKS logo complements the engine bay.

    This radiator cap provides the reliable cooling performance under severe driving conditions. The injection-valve opening pressure is set to 1.1kgf/cm2, and silicone rubber is utilized as a packing part to improve sealing properties.

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  • Upgraded Ignitionability, Durability and anti-insulation

    It has improved ignitionability by the 0.6mm iridium alloys center electrode and platinum square chip, thermal edge and supporting spark gap. It also prevents from pile of carbon and insulation.

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HKS parts for MAZDA ROADTER/MX-5 [ND5]

Code No. Product Engine Remark
LEGAMAX Premium 1.5L/2.0L Compatible with 6MT/6AT and 2.0L/1.5L
JQR is obtained only for 1.5L.
LEGAMAX Sports 1.5L/2.0L Compatible with 6MT/6AT and 2.0L/1.5L
JQR is obtained only for 1.5L.
HIPERMAX MAX IV GT 20 SPEC 1.5L/2.0L Developed for"Special Package MT" car and "Leather Package AT" car
HIPERMAX MAX IV GT 1.5L/2.0L Compatible with 2.0L/1.5L
HIPERMAX MAX IV SP 1.5L/2.0L Compatible with 2.0L/1.5L
Pro Kit
2.0L Engine management part is not included.
(Resetting of fuel & ignition is required.)
Applicable for left hand drive. NOT test with right hand drive and 2019 model.
FLASH EDITOR 1.5L Available only for JDM
OB-LINK TYPE-001    
52001-AK071 Racing Pro -5W-30 20L 1.5L/2.0L For High Grade
Normal viscosity: 5W-30
52001-AK111 SUPER OIL Premium 5W-30 SN 4L 1.5L/2.0L For STD
Normal viscosity: 5W-30
52001-AK105 SUPER OIL Premium 7.5W-35 4L 1.5L/2.0L For STD
Normal viscosity: 5W-30
OIL FILTER (φ68-M20) 1.5L/2.0L  
RADIATOR CAP 1.5L/2.0L S-type
108kPa (1.1kgf/cm2)
50003-M40HL SUPER FIRE RACING M40HL 1.5L/2.0L Stock Plug: M12Long Reach HEX14:7
4 plugs are required.

* These products are in development. The specification might change.