Maruha Individual Throttle Body (ITB) Full Kit · NA8 / NB Miata BP 1.8L

The most visceral engine upgrade available for the 1.8L Miata. Maruha's ITB kit replaces the single throttle body with individual throttles for each cylinder — the result is throttle response unlike anything a single-body system can achieve, combined with an intake sound that defines what a Miata engine should sound like at full rev. Maruha has done the engineering: dyno development, tuning maps, and fitment refinement over years of NA/NB ITB builds.

Specifications:

• Individual throttle body per cylinder — eliminates plenum lag entirely

• Designed specifically for NA8 and NB Miata BP 1.8L engine dimensions

• Includes velocity stacks, linkage, fuel rail adaptation, and installation hardware

• Requires ECU re-tune for correct fuelling — Maruha recommends Freedom ECU or equivalent standalone

• ECU not included — sold separately

• Dramatic improvement in throttle response and top-end power delivery

Fitment: NA8 Miata 1994–1997 · NB Miata 1998–2005 · 1.8L BP-ZE engine.

Made in Japan. Authorized Maruha import by Chikara Motorsports — North America's only official Maruha dealer.