Beyea IDM-604-S1B2 IMCA Dirt Modified 4-1 Header
Beyea IDM-604-S1B2 IMCA Dirt Modified 4-1 Header
Beyea

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#19660401

Beyea IDM-604-S1B2 IMCA Dirt Modified 4-1 Header

  • Will fit the 604 GM crate engine exclusively
  • These 4 to 1 tube headers are made from heavy duty steel
  • Collector length measures 2-3/4" x 9 in. with 10" turn down
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$417.99

/pair

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Product Summary

4 to 1 Header Tube Type, Square Exhaust Port Shape

  • Will fit the 604 GM crate engine exclusively
  • These 4 to 1 tube headers are made from heavy duty steel
  • Collector length measures 2-3/4" x 9 in. with 10" turn down
  • Specially designed to make sure that you get every last bit of useable power out of your engine
  • Works with Assault, Bandit, Kazz, Lethal, Lightning (2009-Older), Longhorn, MB Custom (2017-older), Shaw (2017-UP), TRC
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Key Specs

MFG. Part #IDM604S1B2
Header Tube Type4 to 1
Exhaust Port ShapeSquare
Flange StyleStandard
Primary Tube Diameter1-5/8 to 1-3/4"
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Need To Know

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855.313.9176
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Beyea IDM604S1B2 Details

Finding any advantage is key to success in dirt track racing; Be the first to victory lane with Beyea Headers! A proven performer and a name known around the world - Beyea Headers are a tried and tested solution to your horsepower problems. 15 years of dedicated research and design has gone into each and every header from Beyea Headers to make sure that you get every last bit of useable power out of your engine to propel you to the top step of the podium!

  • Includes gaskets
  • 604 crate engine
  • Collector Length: 2-3/4" x 9 in. with 10" turn down
  • 1-5/8" x 1-3/4" stepped headers

  • Fits Assault, Bandit, Kazz, Lethal, Lightning (2009-Older), Longhorn, MB Custom (2017-older), Shaw (2017-UP), TRC

Guides & Documents

Choosing the Right Headers

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.
CA Prop 65
CARB warning

Beyea IDM604S1B2 Specifications

KEY SPECS
MFG. Part #IDM604S1B2
BrandBeyea
Header Tube Type4 to 1
Exhaust Port ShapeSquare
Flange StyleStandard
Primary Tube Diameter1-5/8 to 1-3/4"
Material TypeSteel
ColorBlack
Weld-UpNo
Collector Diameter2-3/4 Inch
FinishPainted
Hardware IncludedNo
Gasket(s) IncludedYes
Collector Reducers IncludedYes
Collector Reducer Exit Diameter2.25"
Collector Attachment TypeSlip fit
GENERAL
Sold in QuantityPair
NotesFor GM 604 Crate Engine. Single step.
Collector Length9"

Ratings & Reviews

5

2 Reviews

Overall Assessment

Customers confirm that the product consistently performs well, particularly highlighting its excellent application to a 604 crate dirt modified. The product's quality stands out, gorgeous in appearance on various models like the 604; this further underlines the product's evident practicality and adaptability. In comparison to competitors, customers recommend this product for its superior features and cost-effectiveness. There is a substantial satisfaction with the high-quality material used in the product, ensuring its durability and safety, thereby offering great value for money.

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5

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5.0

4 years ago

TYLER KLEINER

DUBUQUE IOWA

Verified

GREAT PERFORMANCE ON OUR 604 CRATE DIRT MODIFIED

Would Recommend

Great quality great price

5.0

6 years ago

5w

Nimpomo

Verified

Looks great on my 604

Would Recommend

Showing 2 of 2 reviews

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