The Fab Shop Header Sizing Information

Sizing Instructions for Dragster Headers

Locate the cubic inch of your engine in the left hand column, then look across that row to the horsepower range that your engine falls into to see what size tubes should be used.

 

600-750
HP

750-850
HP

850-950 HP

950-1050 HP

1050-1150 HP

1150-1250 HP

1300-1400 HP

1400-up HP

468-520 cid

2 1/8"

2 1/8"

2 1/8" - 2 1/4"

2 1/8" - 2 1/4"

2 1/4"

2 1/4" - 2 3/8"

2 3/8"

2 1/2"

520-582 cid

2 1/8"

2 1/8"

2 1/8" - 2 1/4"

2 1/4"

2 1/4"

2 1/4" - 2 3/8"

2 3/8" - 2 1/2"

2 1/2"

582-632 cid

 

2 1/8"

2 1/8" - 2 1/4"

2 1/4"

2 1/4" - 2 3/8"

2 1/4" - 2 3/8"

2 3/8" - 2 1/2"

2 1/2"

632-up cid

 

 

 

2 1/4"

2 1/4" - 2 3/8"

2 1/4" - 2 3/8"

2 3/8" - 2 1/2"

2 1/2"

*ALL BLOWER CARS USE 2 1/2” OR ZOOMIES

 

Ordering Instructions:

Please have the following information ready when you call:

  • Engine Make (BBC, SBC, Etc.)
  • Head Type
  • Finish Line RPM
  • Accessories Needed (EGT, O2 Sensor Bungs, Pan-E-Vac, Etc.)
  • Header Material Desired (Mild Steel, Stainless, Inconel, Titanium)
  • Finish Type (Nitroplate, Chrome, Etc.)
NHRA IHRA ADRL NTPA
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