Mazda MX-5 NC 2.5L Swap — 4-1 Headers & 70mm Exhaust
Mazda MX-5 NC upgraded with a 2.5L Duratec engine swap, equipped with 4-1 performance headers, K&N air filter and full 70mm exhaust system. Custom calibrated on the stock ECU by DMS Tuned.
Vehicle Specification
- Mazda MX-5 NC 2.5L Duratec swap
- 4-1 performance headers
- K&N air intake filter
- Full 70mm exhaust system
- Stock 2.0 ECU
- Custom ECU calibration by DMS Tuned
Performance Strategy
The 4-1 header design improves high-RPM breathing, while the 70mm exhaust reduces backpressure for stronger mid-to-top end power. With optimized VVT mapping and fueling calibration, the naturally aspirated 2.5L setup delivers responsive throttle and consistent torque delivery.
Related Services
Mazda MX-5 Performance Upgrades
Duratec Performance Camshafts
Custom ECU Calibration
Dyno Testing & Calibration