Product Summary

Cat-Back Exhaust System Type, 1 Muffler Quantity

  • Dual 2.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Dual 3.50-inch polished tips exit dual out the rear or side for a custom look
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • 50 Series Big Block performance muffler delivers a deep, moderate performance tone and improves exhaust flow
  • Flowmaster’s Lifetime Limited Warranty
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Key Specs

MFG. Part #818113
BrandFlowmaster
Exhaust System TypeCat-Back
Single or DualDual | Single Exit
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Flowmaster 818113 Details


This Flowmaster® American Thunder® cat-back exhaust system for the 2019-2024 Chevrolet/GMC Silverado/Sierra with the 2.7-liter engine is manufactured using durable 409 stainless steel throughout and features dual 2.50-inch mandrel bent pipes for better exhaust gas flow, and an American Thunder muffler is used for a moderate sound level and maximum performance. Gain up to 4 hp and 11 lbs-ft of torque at the rear wheels over stock. This system exits dual out the rear or dual out the side, with dual 3.50-inch polished tips for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster's Lifetime Limited Warranty.
  • Dual 2.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Dual 3.50-inch polished tips exit dual out the rear or side for a custom look
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • 50 Series Big Block performance muffler delivers a deep, moderate performance tone and improves exhaust flow
  • Flowmaster’s Lifetime Limited Warranty
  • Gain up to 4 hp and 11 lbs-ft of torque at the rear wheels
  • Fits 147-inch and 157-inch wheelbases

    Fits 2019-2024 Chevrolet/GMC Silverado/Sierra trucks with 2.7-liter engines, 2 & 4-wheel drive.

  • Flowmaster 818113 Specifications

    KEY SPECS
    MFG. Part #818113
    BrandFlowmaster
    Exhaust System TypeCat-Back
    Single or DualDual | Single Exit
    GENERAL
    Muffler Quantity1
    Exhaust Tip IncludedNo
    Exhaust Tip Quantity2
    Exhaust Tip ShapeRound
    Exhaust Tip CutAngle
    Exhaust Tip Edge StyleCut Edge
    Exhaust Tip Size3.50"
    Exhaust Tip Length13"
    Exhaust System FinishNatural
    Muffler Body ShapeOval
    Muffler Inlet Diameter3.5"
    Muffler Outlet Diameter2.5"
    Muffler Overall Length28"
    Muffler Body Length22"
    Muffler FinishPainted
    Muffler ColorBlack
    Exhaust Tip Material304 Stainless Steel
    Exhaust Tip FinishPolished
    Mount TypeUses Factory Hangers
    Sold in QuantityEach
    GTIN Code00090127615539
    Material Type409 Stainless Steel
    Gaskets IncludedNo
    Catalytic Converter Quantity0

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