Brian Crower Mazda MZR / Ford Duratec 2.3L 2.5L Stage 4 280 Race Camshafts - BC0403

Key Features & Specs:

• Brand: Brian Crower
• Part Number: BC0403
• Engine Platform: Mazda MZR / Ford Duratec 2.3L and 2.5L
• Part Type: Camshaft set
• Camshaft Stage: Stage 4 / Stage 3+ Race Spec
• Camshaft Spec: 280 Spec
• Advertised Duration: 280° intake / 272° exhaust
• Duration @ .050: 234° intake / 228° exhaust
• Valve Lift with 1:1 Ratio: .402 in. intake / .401 in. exhaust
• Valve Lift Metric: 10.21mm intake / 10.18mm exhaust
• Engine Requirement: Intended for fully built engines
• Tuning Note: Tuning and ECU modifications recommended
• Required Kit: BC0400
• Application: Race, drag, track, and high-rpm performance builds

Fitment:

• Mazda MZR 2.3L Engines
• Mazda MZR 2.5L Engines
• Ford Duratec 2.3L Engines
• Ford Duratec 2.5L Engines

The Brian Crower BC0403 camshafts are a race-focused upgrade for Mazda MZR and Ford Duratec 2.3L/2.5L engine platforms built for high-rpm power and serious performance use. This Stage 4 280 spec, also listed as a Stage 3+ Race Spec profile, is intended for fully built engines where increased duration, airflow, and top-end horsepower are the main goals. With 280°/272° advertised duration, 234°/228° duration at .050, and over 10mm of valve lift, these camshafts are designed for aggressive naturally aspirated, boosted, track, drag, and competition engine combinations. Tuning and ECU modifications are recommended, and Brian Crower kit BC0400 is required for proper installation.