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Flowmaster American Thunder Exhaust Systems 818113 System, Series, Cat-Back, Split Side/Split Side Exit, Stainless Steel, Natural, Polished Tips, Chevy, GMC, Kit

SKU: FLO818113

Exhaust Systems

Flowmaster American Thunder Exhaust Systems 818113 System, Series, Cat-Back, Split Side/Split Side Exit, Stainless Steel, Natural, Polished Tips, Chevy, GMC, Kit

SKU: FLO818113

Exhaust Systems
A$2,878.03
LAST ONE! Est Ship 4-7 days. In stock at 1 location (only 1 available)

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Description

Exclusive Flowmaster flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Flowmaster part numbers. There's never been a better time to buy your Flowmaster upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Data: v2 - Desc: v4.2 - Upd: 2026-11-10 04:12:14

Data: v4.2 - Upd: 2026-11-11 03:04:23

Features

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

(keyword: side exit)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Flowmaster, Flowmaster (holley)
StreetFX SKU flo818113
SFX Item ID 4983986
Accounting SKU flo-818113
Manufacturer SKU 818113
Manufacturer UPC 090127615539
Alternative References 818113, FLM818113, FLO-818113

Exhaust System, American Thunder Series, Cat-Back, Split Side/Split Side Exit, Stainless Steel, Natural, Polished Tips, Chevy, GMC, Kit

Flowmaster American Thunder exhaust systems are designed with the latest exhaust technology available--resulting in improved acceleration, passing power, and fuel mileage. A key to these performance upgrades is Flowmaster's use of mandrel-bent tubing, which allows superior exhaust gas flow. The systems also feature mufflers (single or dual) that deliver plenty of the rich Flowmaster sound you expect. Components are built from stainless steel or aluminized steel; and some models include tips. American Thunder exhausts are available in more than a hundred configurations for fitment on specific truck and car applications.

Product Attributes
BrandFlowmaster
Manufacturer's Part Number818113
Part TypeExhaust Systems
Product LineFlowmaster American Thunder Exhaust Systems
UPC090127615539
System Material409 stainless steel
System StyleCat-back
Exhaust TypeSingle in/Dual out
Exit LocationSplit rear/Split side
System FinishNatural
Catalytic Converter(s) IncludedNo
Intermediate Pipe Diameter (in.)3.50 in.
Muffler IncludedYes
Muffler QuantityOne
Muffler ConfigurationSingle inlet/Dual outlet
Muffler StyleChambered
Muffler Material409 stainless steel
Muffler FinishBlack
Hardware IncludedYes
Tailpipe Diameter (in.)2.50 in.
Tip IncludedYes
Tip Outlet Size (in.)3.50
Tip Quantity2
Tip ShapeRound
Tip CutSlant
Tip Edge StyleRolled edge, double-wall
Tip Material304 stainless steel
Tip ColorPolished
RemanufacturedNo
QuantitySold as a kit.
NotesFits 147 and 157 in. wheelbases only.
Special AttentionIt is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.

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