Maruha Hi-Flow Catalytic Converter · NA8 Miata 1.8L
Maruha's high-flow catalytic converter for the NA8 1.8L — same round honeycomb design philosophy as the NA6 unit, engineered for the larger 1.8L exhaust system dimensions. For NA8 builds running Maruha's RS Header, F Cams, or Race Cams, the stock cat is the restriction point that limits what those parts can deliver. This resolves it cleanly.
Specifications:

Round honeycomb core — lower restriction than OEM square-brick catalyst design
Designed for NA8 1.8L exhaust system dimensions
Works optimally paired with Maruha RS Header or Maxim Works header
Retains catalytic function — not a test pipe or decat
Direct bolt-in replacement at OEM catalyst location

Fitment: NA8 Miata 1994–1997 · 1.8L BP-ZE engine.
Made in Japan. Authorized Maruha import by Chikara Motorsports — North America's only official Maruha dealer.