Doug's Headers® - 4-Tube Steel Long Tube Exhaust Headers

1 review|Item # 447932225
Guaranteed Fit
2003 Chevy Avalanche
Fitment notes:
  • 1500
Authorized Dealer
$481.45 - $612.45
In Stock - Ships in 24 to 48 hrs
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Features

  • Doug's Headers D3373 Metallic Ceramic Coating
  • 3/8" thick flanges
  • CNC mandrel bent tubes... accurate fit & better flow
  • Precision formed long transition collectors and long tube design... reduces backpressure and increases higher RPM horsepower
  • Heavy 16 gauge tubing
  • Tubes are pre-polished to remove scratches and the header is finished with a Metallic Ceramic Thermal Barrier
  • Coating polished to a high luster appearance offering corrosion and heat resistance up to 1400 degrees

Product Details

Chevy Avalanche 1500 2003, 4-Tube Steel Long Tube Exhaust Headers by Doug's Headers®. Primary Tubing Diameter: 1.625". Header Coating: Ceramic. Header Style: Long Tube. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

Doug's Headers Authorized Dealer
Brand:
Doug's Headers
Part Number:
D3373D3373-B

Reviews

(1)
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/5
1-1 of 1 Reviews
5 of 5
Woke Up My Car
I'm restoring my 1963 Mercury Meteor. Headers fit great, look killer. The car pulls so much better off the line now. Not the easiest install but totally worth it.
Doug's Headers® D662Y - Tri-Y Metallic Ceramic Coated Long Tube Exhaust Headers
Posted by Jerome (Charlotte, NC) / February 09, 2025