MX-5 NC 4-2-1 exhaust manifold

A MAD Fabworx original design, created out of passion for engines and performance. The project was developed using professional CAD and CAE software.

The 4-2-1 manifold was engineered to maximize torque in the mid-range – exactly where the MX-5 spends most of its time on the road and when powering out of corners on the track.

The only fully equal-length 4-2-1 manifold on the market – with a runner length difference of less than 1.0 mm.

This manifold is the perfect combination of precision engineering and modern manufacturing methods. Thanks to its equal-length design and optimized pipe diameters, it offers the ideal balance between performance and engine smoothness.

Performance improvement:

• Up to 10 PS and 12 Nm without ECU remapping
• Up to 15 PS and 20 Nm with ECU remapping

*maximum difference values measured on the engine - may differ upon engine, fuel, dyno setup, etc.

• Fits 1.8, 2.0, and 2.5 engines in the Mazda MX-5 NC
• Original CAD/CAE project – designed and validated with top-tier engineering software
• CNC-bent and TIG-welded pipes – optimized for exhaust flow
• Equal-length runners – less than 1.0 mm difference, unique on the market
• Pipe diameters:
  • Primaries: 45 mm
  • Secondaries: 50 mm
  • Outlet: 60.3 mm (2.5")

Kit includes:

1. 4-2-1 true equal length exhaust manifold
2. manifold-to-head gasket
3. exhaust gasket
4. protective sleeve for the coolant hose running above the manifold
5. optional: O2 sensor with extended harness – no wiring modification required

Application:

Mazda MX-5 (Miata) NC (2006-2015) - LHD - all engines