Maruha Hi-Flow Catalytic Converter · NA6 Miata 1.6L
Maruha's own-design high-flow catalytic converter for the NA6 1.6L. Unlike the traditional square-brick catalyst design, Maruha engineered a round honeycomb core for significantly reduced exhaust restriction while maintaining emissions compliance. A critical upgrade for any NA6 running performance cams, headers, or exhaust — the stock cat becomes the bottleneck quickly.
Specifications:

Round honeycomb core design — dramatically lower restriction than OEM square-brick catalyst
Designed specifically for NA6 1.6L exhaust system dimensions
Improves exhaust flow for maximum benefit from header and cam upgrades
Retains catalytic function — not a test pipe or decat
Direct bolt-in replacement for OEM catalyst location

Fitment: NA6 Miata 1990–1993 · 1.6L B6ZE engine.
Made in Japan. Authorized Maruha import by Chikara Motorsports — North America's only official Maruha dealer.