Standard Uncoated Engine Swap Hedders; 1-5/8" Tube Dia.; 3" Coll.; FULL LENGTH Design

Application Summary:

1982-1993 Chevrolet S10; 1983-1993 Chevrolet S10 Blazer; 1982-1990 GMC S15; 1983-1991 GMC S15 Jimmy; 1991-1992 GMC Sonoma
Air Conditioning Yes
Application Automotive
Automatic Transmission - Column No
Automatic Transmission - Floor Yes
Bolts/Studs Included Yes
California Proposition 65 WARNING: Cancer. For more info visit
Catalytic Converter(s) Included No
Coating/Finish Painted
Collector Attachment 3"
Collector Bolts Included Yes
Collector Size 3"
Collector Style Ball and Socket Style (Gasketless)
Collector Tube Size (in.) 3
Contents One pair of headers, head flange gaskets, collector flange gaskets (when applicable), 3-bolt exhaust adapters, mounting hardware
Country of Origin (Primary) US
Crossover Pipe Included NO
Cylinder Head Fits Factory GM Aluminum or Cast Iron, Angle Plug and Straight Plug Heads.
Cylinder Head Port Shape Round
Drivetrain 2WD Only!
E.O. # No
Emissions Notes NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only.
Engine 283-400 SB Chevy (Gen1)
Engine Make/Size Chevy Small Block (262-400)
Engine Notes Will work with ANGLE PLUG heads (Chevy Aluminum only)
Exhaust System Dia 2-1/2"
Finish Uncoated
Finish Type Uncoated Mild steel
Flange Style Standard
FLANGE Thickness 0.25"
Footnotes 130. Must use Trans Dapt Motor Mount Kit #4690.
Gasket # 27500
Gasket Or Seal Included Yes
Harmonized Tariff Code (Schedule B) 8708925000
Hazardous Material Code N
Head Flange Gasket 27500
Header Construction Standard-Duty
Header Finish Uncoated
Header Material Mild Steel
Header Port Shape Round
Header Style Long Tube- Under Chassis Exit
Installation Hardware Included Yes
Installation Notes The use of a DELCO-RAMEY #323-255 or Chevrolet #187655 starter may be required.
Life Cycle Status Code Available to Order
Manual Transmission - Column No
Manual Transmission - Floor No
Material Mild Steel
Motor Mounts (Included) NO
Motor Mounts Included NO
Mounting Hardware Included Yes
NAFTA Preference Criterion Code B
Notes Two tubes on each side have slip-fit joints for easier installation.
Oil Filter Compatibility Use of Trans-Dapt 1122 oil filter relocation kit recommended with these headers
Package Contents One pair of headers, head flange gaskets, collector flange gaskets (when applicable), 3-bolt exhaust adapters, mounting hardware
Port Shape Round
Power Steering Yes
Primary Tube Diameter (in) 1.625"
Primary Tube Gauge 18g
Quantity Sold as a pair.
Reducer Outlet Size 2-1/2"
Reducers Included Yes
Replacement Gasket 27500
Replacement Head Flange Gasket 27500
SDR Required Flag N
Transmission Compatibility For use with TH350 transmission and 168 tooth flywheel.
Transmission Mount Included NO
Transmission Mount/Crossmember (Included) No
Transmission Mount/Crossmember Included No
Tube Design LONG TUBES
Tube Diameter 1-5/8"
Tube Direction Down Swept
Tube Length LONG Tubes
Tube Material Thickness 18g
Tube Size 1-5/8"
Tube Style Long Tube
Tuned NO
Variations 69496
Weld-Up No
with A.I.R. No
with A.I.R. System No
with EGR No
Y-Pipe Included No

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Hedman Hedders 69490 Uncoated Engine Swap Headers; 1-5/8" Tube Dia; 3" Coll; FULL LENGTH

Product Information

  • Brand: Hedman
  • Product Number: 69490
  • $404.91

The AAM Group™ Proposition 65
Proposition 65 warning graphic Cancer. For more info visit