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Edelbrock 5421 396-454 Chevy Dual Quad Intake Manifold, Rectangle Port

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Specs
Material Type:
Aluminum
Overall Height:
4.65
Sold in Quantity:
Each
Finish:
Natural
Port Height:
2.30
Port Width:
1.66
MFG. Part #:
5421
Intake Manifold Type:
Dual Plane
Carburetor Quantity:
Two
Carburetor Flange Type:
4-Barrel Square Bore
Edelbrock 5421 396-454 Chevy Dual Quad Intake Manifold, Rectangle Port
Edelbrock 5421 396-454 Chevy Dual Quad Intake Manifold, Rectangle Port

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Details

Reviews

Q & A

What's in the Box

Designed for 396-454 c.i.d. big block Chevy with rectangular port heads. Has an optimum power range of 1500-6000 rpm. Edelbrock testing has confirmed smooth, consistent part-throttle operation with a 25 hp gain over single 4BBL low-rise single plane intakes and a torque gain of 30 ft/lbs. over single 4BBL low-rise dual plane intakes.

  • Carb center to carb center is 6-7/16"
  • Will NOT fit tall-deck truck blocks
  • Carburetor Recommendation: Performer Series, 600 cfm

325-5421 Instructions (PDF)

Notes

  1. Will only work with Edelbrock/Carter AFB carburetors. Will NOT work with Holley/Demon carbs as the bolt pattern and carb spacing do not match these carbs.
  2. Will NOT fit tall-deck truck blocks.
  3. HEI distributor will fit.

Specs

  • Port exit dimensions: 1.66" x 2.30"
  • Carb center-to-center: 6-7/16"
  • Manifold height @ front: 3.95"
  • Manifold height @ rear: 4.65"
  • Carb pad height: 4.30"

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325-5420 Instructions (PDF)

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