4-1 Style Modified Headers
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BEYEA CUSTOM HEADERSPART NUMBER: 076-IDM-604-S1B2

4-1 Style Modified Headers

$51039
ShippingShips on Sep 22, 2026
Lowest PriceLowest Price Guarantee

Headers for 604 Small Block Chevy Crate Motors
    IMCA/UMP Modified Header
  • 604 Small Block Chevy Crate Motor
  • Collector Style: 4 to 1
  • Collector Length: 9 in. w/10 in. Turn Down
  • Primary Tube: 1 5/8 x 1 3/4 in. Single Step
  • Fits: Bandit, Lethal, Lightning (2009-older), Longhorn, MB Custom, Sh

    4 to 1 Style Collectors

    Beyea 4-1 Collector Style Dirt Modified Headers typically produce more top-end power. Tuned and tested through the years 4-1 style collector headers provide perfect the power curve to produce a broader range of power. Laser-cut 5/16 in. flanges provide a solid mounting surface to ensure good support and seal. The paint applied to these headers is a temporary coating only and is designed to burn off during use. A high-temperature paint or high-temperature coating is recommended. Let your engine breathe with Beyea. IMCA and UMP accepted.

    Note: Header bolts not included

Part TypeHeader
Product LineBeyea 4-1 Collector Style Dirt Modified Headers
BrandBEYEA CUSTOM HEADERS
Package Height11.0
Package Width18.5
Package Length36.75
Weight32.0 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberIDM-604-S1 B2
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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