Ford Falcon XR XT XW XY – 302 & 347 Windsor V8 High Performance Exhaust Headers

The EXT457D-MTO headers are engineered for serious Windsor V8 performance applications, designed specifically to suit large-port 1.75" alloy cylinder heads with the wide 76mm bolt pattern. These tuned-length headers improve exhaust flow, RPM response and top-end power, while maintaining strong torque through the mid-range — ideal for street/strip 302, 331 and 347 stroker builds.

Engine Airflow Data (Verified)

• 302ci Windsor (4.95L)
  • Intake airflow @ 4000 rpm ≈ 16,830 L/min
  • Exhaust gas volume @ 600°C ≈ 20,540 L/min
• 347ci Windsor Stroker (5.68L)
  • Intake airflow @ 4000 rpm ≈ 19,290 L/min
  • Exhaust gas volume @ 600°C ≈ 23,540 L/min

These figures reflect real-world VE and the thermal expansion of exhaust gases. The larger 1.75" primary tubes are well matched to the airflow demands of high-output alloy-headed 302 and 347 Windsor engines.

Key Features

• Tuned-length design for high-performance Windsor engines
• Mandrel-bent 1.75" primaries with 3.00" outlets
• Designed for large-port alloy heads
• Wide 76mm bolt spacing
• Australian-made construction
• Built to order – approx. 4–6 weeks

Technical Specifications

• Part Number: EXT457D-MTO
• Primary Pipes: 1.75"
• Secondary Pipes: —
• Outlet: 3.00"
• Material: Mandrel-bent steel
• Fitment Notes: Will not fit with power steering

Installation Tips

Lubricate all stud and bolt threads with WD40 or equivalent before removal and installation. Always check for clearance around steering components and starter motor on custom stroker engines.

Recommended With

• Header Bolts – See product code "BOL03-10"
• Sealant – See product code "9AB"

Customer Support

For phone orders, advice, or part enquiries – contact us:

📞 Call Now: +61 2 9547 3511 ✉️ Email Us

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87A Planthurst Road, Carlton NSW 2218, Australia
Exhaust Systems Since 1983