Designed around 97–98 Mazda MX5 / Miata / Eunos Roadster Mk1 (NA) with the 1.8 engine (BP), this unequal-length tubular manifold uses deliberately varied runner lengths to preserve a distinctive exhaust pulse.

The manifold uses 1.75-inch to 2.5-inch stainless steel pipework with TIG-welded joints; its runner and collector layout is designed to improve exhaust flow and support sharper engine response.

Key features

• Vehicle-specific fitment: Mazda MX5 / Miata / Eunos Roadster Mk1 (NA) — 97-98
• Unequal-length runner layout for a more distinctive exhaust character
• 1.75″ to 2.5″ pipework · Stainless Steel construction · TIG-welded joints
• Fitting kit included

Sound and character

The unequal-length layout creates a more distinctive, characterful exhaust pulse.

Fitment notes

Fits 97–98 Mazda MX5 / Miata / Eunos Roadster Mk1 (NA) with the 1.8 engine (BP). Configured for the 470 mm adjoining section.

Important: The heater-core water pipe may require adjustment; refer to the fitting video before installation.

What’s in the box?

• 1 × EGR Blanking Plate
• 1 × Unequal-Length Tubular Exhaust Manifold
• 1 × Manifold Adapter Pipe
• 1 × Fitting Kit