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Flowtech 31506 - FlowTech Headers

Flowtech 31506 - FlowTech Headers

JEGS Part Number: 387-31506

Long Tube Headers
  • Chevy 283-400
  • 1967-87 Chevy/GMC 1/2, 3/4 & 1-Ton 4WD
  • 1967-91 Blazer/Jimmy K5, Suburban 4WD
  • 1.625'' Tube
  • 2.5'' Collector
  • Ceramic Coated

    Flowtech 31506 - FlowTech Headers Details

    GM Truck/SUV

  • Ceramic Coated

  • Must modify stock exhaust to retain catalytic converters
  • Applications with oxygen sensors use reducers 387-10105 for 2-1/2'' three bolt flange
  • On 1983-84 4WD, it is necessary to remove the rubber stopper below the starter
  • Installation Requires A/C Bracket 387-10042
  • May require clutch linkage modifications
  • Header has a dimple on drivers side primary tube for spark plug boot clearance.

  • Performance Plus Fuel Economy at a Price You Can Afford!

    These headers are made of 16-gauge tubing that's welded to O-ring port exhaust flanges on one end and mandrel-formed collectors on the other. You get a premium performance-minded design with a budget-minded attitude!

  • 16-gauge (.049" thick) cold-rolled mild steel (except stainless steel were noted)
  • Precision engineered for performance, fuel economy, and fit
  • Mandrel-formed plenum increases flow for more power
  • Leakproof O-ring port seals quality tested by FlowTech
  • Finished with black paint or ceramic coating, polished available for some applications

  • Flowtech 387-31506

    Tube Size
    Collector Tube Size (in.)
    Engine Make/Size
    Chevy Small Block (262-400)
    Tube Direction
    Down Swept
    Metallic Ceramic
    Port Shape
    Mild Steel
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