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Flowmaster 2.5 in. Scavenger Series Elite Shorty Headers (07-09 4.8L, 5.3L Sierra 1500)

AmericanTrucks no longer carries the Flowmaster 2.5 in. Scavenger Series Elite Shorty Headers (07-09 4.8L, 5.3L Sierra 1500). Please check out 2014-2018 Sierra 1500 Headers for an updated selection.

Features & Details

  • Increased Gains In Horsepower and Torque
  • Improves Throttle Response and Efficiency
  • Polished Finish
  • Ceramic Coating
  • 50 State Emissions Certified
  • Made In The USA
  • Made Out Of 14-Gauge 409 Stainless Steel
  • Increased Diameter Allows For Better Airflow
  • Moderate-Level Installation
  • 1-Year Warranty
  • Fits The 2007-2009 4.8L, 5.3L Sierra 1500
Elite Performance. Flowmaster is back with the  Flowmaster 2.5 in. Scavenger Series Elite Shorty Headers, which optimizes gas pedal power to see increased gains in horsepower, torque, efficiency and throttle response. Its polished finish and ceramic coating combined with breakneck performance delivery is a stylistic and functional upgrade to your Sierra 1500. It is 50 state emissions certified and is proudly made in the U.S.A.

Durable Construction. This header is made out of 14-gauge 409 stainless steel and high-temperature ceramic coated for extra durability under the roughest conditions. Its increased diameter allows for better airflow and lasts longer than restrictive factory manifolds.

Warranty. Flowmaster provides a 1-year limited warranty, which covers the product from defects in materials and workmanship. To learn more about what the warranty covers, please visit the manufacturer’s website.

Installation. Installing this header has a medium level of difficulty. Installation instructions are included in the package. Users also have the option of using a professional installer.

Application. The Flowmaster 2.5 in. Scavenger Series Elite Shorty Headers fits the 2007-2009 4.8L, 5.3L Sierra 1500.

Fitment: 2007 2008 2009 Details

MPN# 814123

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Drivers Side Header Assembly
  • (1) Passenger Side Header Assembly
  • (2) Head Flange Gaskets
  • (1) Collector Flange Gasket
  • (1) Passenger Side Collector Gasket for P/N 1850S-1 & 1850S-3)
  • (13) 8mm Header Bolts
  • (13) 8mm Lock Washers
  • (3) 3/8” x 1½” Collector Bolts (Driver’s Side)
  • (3) 3/8” x 2” Collector Bolts (Passenger Side)
  • (6) 3/8” Lock Washers
  • (6) 3/8” Nuts
  • (1) CARB Emissions Sticker
  • (1) Flowmaster Decal
  • Installation Instructions
Installation Info
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