| Bolt on header for Blockzilla engine: - 2 Stage Bolt on Header: 18.5" overall length, stage one 1.1250 or 1 1/8" OD, stage two 1.250 or 1 1/4" Od, Bolt holes are 1.500 center to center, Comes with exhaust gasket. Ceramic coated.
- Comes with header gasket.
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