Fujitsubo Authorize RM Exhaust and KenStyle Diffuser - MX5 Mk4 (ND)

Fujitsubo Authorize RM Exhaust and KenStyle Diffuser - MX5 Mk4 (ND)

Special order - Please contact for ETASpecial orderPlease contact for ETA
SKU: 250-42447

Established in 1931, Fujitsubo have been manufacturing exhausts in Japan for many years, providing them with the sort of experience that’s required to craft some of the best exhausts on the market. A JDM brand in the purest sense, the quality, fitment and performance of their systems is second to none.

Designed to offer more noise, improved performance and carry less weight than OE systems, the Authorize R is Fujitsubo’s current flagship exhaust system. Constructed entirely from stainless steel, each system is designed to complement the factory styling.

This unique Fujitsubo system is supplied with a exclusive KenStyle pre-painted diffuser which is designed to accomodate the quad-tip back box. Each tip is finished with a blue titanium finish.

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  • 2" main pipe diameter
  • 2.75" tip diameter
  • Stainless steel construction
  • Quad exhaust tip with exclusive KenStyle diffuser
  • Includes fitting kit
  • Diffuser is supplied pre-painted in Matte Black
  • Compatible with the i-ELOOP system

Suitable For: 

  • MX5 Roadster 1.5 (ND5RC) Manual Transmission (and Auto up to 2018)
  • MX5 Roadster RF 2.0 (NDERC) Manual Transmission (and Auto up to 2018)

Please Note: Modification to the passenger side of the rear bumper is required to accomodate the additional tips.


  Standard (STD) FUJITSUBO
Intermediate acceleration (50km/h→100km/h) 3.1 seconds 3.0 seconds
Peak Power 86.6kw(117.8ps)/7010rpm 88.8kw(120.7ps)/6880rpm
Peak Torque 145N・m(14.8kg・m)/4350rpm 146N・m(14.9kg・m)/4550rpm
Weight 10.3kg 8.7kg
Idling Exhaust Noise 62dB 65dB
Proximity exhaust noise 5250rpm 88dB 90dB
3000rpm Exhaust Noise 75dB 83dB
5000rpm Exhaust Noise 87dB 86dB
4000rpm〜6000rpm Exhaust Noise 97dB 107dB


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