Upgrade Your NA Miata with a Clean JDM 1.6L B6 Engine and 5-Speed Manual Transmission (1990–1993)

Looking for a reliable engine swap for your first-generation Mazda Miata? J-Spec Auto Sports offers a high-quality used JDM 1990–1993 Mazda Miata 1.6L B6 engine paired with the OEM 5-speed manual transmission (5MT)—imported directly from Japan and perfect for enthusiasts seeking OEM performance, reliability, and easy fitment.

This JDM B6 1.6L DOHC engine was originally found in the 1990, 1991, 1992, and 1993 Mazda MX-5 Miata (NA chassis) and is known for its lightweight design, high-revving character, and dependable daily performance. Ideal for a direct replacement or for your restoration project, this low-mileage motor and transmission combo is tested and inspected before shipment to ensure optimal condition and smooth installation.

Whether you’re rebuilding your Miata after engine failure or just upgrading to a cleaner, better-maintained JDM motor, this setup includes:

• 1.6L DOHC JDM B6 Engine

• Matching 5-Speed Manual Transmission (5MT)

• Engine wiring harness and intake manifold (when available)

• Compression-tested and low mileage

• Backed by J-Spec Auto’s standard warranty

Compatible with 1990, 1991, 1992, and 1993 Mazda Miata NA models, this swap offers a great balance of power and reliability.

Don’t settle for a tired USDM motor—go JDM with J-Spec Auto and bring new life to your roadster. We specialize in high-quality JDM engines and transmissions, with nationwide shipping and customer-first service.

Order your JDM 1.6L Miata engine and transmission combo today and experience why enthusiasts trust J-Spec Auto for performance and reliability.