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Exhaust Exhaust Pipes, Systems and Components

Flowmaster

American Thunder Cat-Back Exhaust System Fits 2019-2023 Silverado/Sierra 1500 With 6.2L Engine Aggressive To Moderate Sound Flowmaster

$1,325.95 $1,249.95 Save $76.00

SKU: F00L 817891

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Flowmaster American Thunder Resonator Delete Kit (817891) is designed for 2019-2022 Chevy Silverado/GMC Sierra 1500 with 5'8" or 6'6" beds and 5.3L or 6.2L V8 engines. It is constructed from stainless steel and features mandrel-bent piping for improved performance and a moderate-aggressive sound level.
Show original supplier description

Part #: 817891

This Flowmaster American Thunder cat-back dual exhaust system for the 2019-2023 GM Silverado/Sierra 1500 (new body style) trucks with the 6.2L engine and factory dual exhaust, is perfect for the person looking for an aggressive sound level outside the truck, with a moderate interior tone and all the performance benefits you would expect from Flowmaster. This emissions-legal bolt-on system fits all 6.2L Crew Cab with 5.5-ft and 6.5-ft beds, and all Double Cab with a 6.5-ft bed and factory dual exhaust tailpipes.Features include a mandrel-bent 3.50-inch stainless steel inlet tube flowing into a single 50 Series HD muffler, dual 2.50-inch mandrel-bent stainless tailpipes replacing the factory resonators and giving your truck some growl. The tailpipes are finished off with quad 4.00-inch black ceramic coated stainless steel tips that exit in place of the factory bolt-on exhaust bezels giving your truck an aggressive performance style and setting your truck apart from others, sending the message that you would rather lead than follow. Designed for an easy fit, this system includes all necessary parts, detailed instructions and hardware for an easy at home installation. Notes: Fits 147-inch and 157-inch wheelbases with 6.2L engine and factory dual tailpipes. Only fits models with factory bumper cutouts.Large 4.00-inch Black Ceramic Coated TipsRemoves Factory Resonators in TailpipesLarge 50 Series HD Performance MufflerModerately Aggressive Exterior ToneBlack Ceramic Coated Quad TipsFull Stainless Steel ConstructionUses Factory Hanger LocationsLifetime Limited Warranty

Features:

  • Large 4.00-inch Black Ceramic Coated Tips
  • Moderate/Aggressive Exterior Tone
  • Removes Factory Resonators in Tailpipes
  • Uses Factory Hanger Locations
  • Large 50 Series HD Performance Muffler
  • Stainless Steel Construction
  • Moderately Aggressive Exterior Tone
  • Removes Resonators
  • Black Ceramic Coated Quad Tips
  • Full Stainless Steel Construction
  • Uses Factory Hanger Locations
  • Lifetime Limited Warranty

American Thunder Cat Back Exhaust System | Dual Out Rear Exit | Incl. 2.5 in. Tubing/Straight Through Mufflers/Round Polished Tips | 409 Stainless Steel

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandFlowmaster
Part NumberF00L 817891

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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