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Summit Racing Long Tube Headers – Ford 400M (SUM-G9034)

Purchased new for my 1978 F-350 project and test-fit only. These did not fit my specific application (2WD manual truck with clutch linkage and front crossmember interference).

These headers are essentially new, never run, and never heat cycled. I applied high-temperature header paint after purchase.

Manufacturer Details

Brand: Summit Racing

Part Number: SUM-G9034

Header Style: Long tube, one-piece

Material: Steel

Primary Tube OD: 1-5/8 in.

Collector Diameter: 3.00 in.

Primary Tube Gauge: 18-gauge

Flange Thickness: 0.31 in.

Collector: 3-bolt flange

Includes 2.25 in. collector reducers

Bolts and gaskets included

Sold as a pair

Manufactured with mandrel-bent tubing and pressure-formed collectors for improved exhaust flow.

Fitment (per Summit)

Ford Modified V8 6.6L / 400M

1978–1979 Ford F-Series & Bronco

Intended primarily for 4WD applications

Compatible with power steering, power brakes, and A/C

️ Important Fitment Note

These did NOT clear my 1978 F-350 2WD manual transmission truck due to clutch linkage and front crossmember interference. The stamp on the box indicated 4wd. Please verify your application before purchasing.

Condition

Test fit only

Never heat cycled or run

Painted with high-temp