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Vehicle Info NeededFLOWMASTERPART NUMBER: 389-818192
818192 Outlaw Cat-Back Exhaust System for 1988–1993 GM 1500/2500 LD 5.7L
$1,04995
Ships on Sep 14, 2026
Lowest Price GuaranteeGM
Outlaw Cat-Back Exhaust System1988–1993 GM 1500/2500 LD 5.7L 3 in. Tubing Dual Out Rear or Side Exit Outlaw Series Muffler 4.50 in. Black Ceramic-Coated Tips Aggressive Sound Stainless Steel Natural Finish
Flowmaster 389-818192 Features:
Flowmaster’s Outlaw Cat-Back Exhaust System is designed for 1988–1993 GM 1500 and 2500 LD trucks equipped with the 5.7L engine. Constructed from durable mandrel-bent 409 stainless steel, this system improves exhaust flow, enhances durability, and delivers the aggressive performance tone associated with the Outlaw Series. A Super 10 Series muffler sharpens exhaust character while reducing restriction for stronger overall performance. The system includes dual 4.5 in. black ceramic-coated stainless steel tips, with the flexibility to exit either dual out the rear or dual out the side, allowing you to tailor the look and sound to your truck. Installation is straightforward using the existing factory hanger locations, detailed instructions, and the included hardware. Fits both single-cab and extended-cab models in 2WD and 4WD configurations. Backed by Flowmaster’s Lifetime Limited Warranty.- Super 10 Series muffler produces a deep, aggressive performance tone while improving exhaust flow
- 3.0 in. and 2.5 in. mandrel-bent 409 stainless steel tubing enhances durability and maximizes exhaust velocity
- Dual 4.5 in. black ceramic-coated stainless steel tips provide a bold, custom appearance
- Factory-style hangers and complete hardware kit ensure an easy, direct bolt-on installation
- Fits 1988–1993 GM 1500/2500 LD single- and extended-cab trucks in both 2WD and 4WD
- Includes Flowmaster’s Lifetime Limited Warranty
Aggressive Race-Oriented Exhaust System
Flowmaster Outlaw Series Exhaust Systems feature race-bred components that ensure minimal flow restriction (slight sound reduction) over open exhaust tubing on vehicles without catalytic converters. With easy fit in mind, these systems are mandrel-bent for maximum performance and mount using stock hanger locations. Outlaw systems are dyno-tuned to improve throttle response, deliver an ultra-aggressive interior/exterior tone, and include all necessary parts and hardware for easy installation.
Part TypeExhaust System
Product LineFlowmaster Outlaw Series Exhaust Systems
BrandFLOWMASTER
Package Height11.25
Package Width16.25
Package Length58.5
Weight68.0 PG
Tailpipe Diameter (In.)3
Muffler Inlet Inside Diameter3 in.
Hangers IncludedYes
Main Piping Diameter3 in.
Tail Pipe QuantityDual
Inlet TypeClamp-On
Exhaust Tip Material304 Stainless Steel
Catalytic Converter Quantity0
Exit LocationDual Out Rear or Dual Out Side
Inlet QuantityOne
Muffler Body Length6.50 in.
Sound LevelAggressive
Muffler Body Material409 Stainless Steel
Exhaust Tip CutAngled
Gasket Or Seal IncludedNo
Exhaust Tip IntercooledNo
Pipe ColorSilver
System FinishNatural
Muffler Quantity1
Muffler Inlet Outside Diameter3.13 in.
Exit QuantityDual
Muffler Flanged OutletNo
Tip Quantity2
Exhaust Tip ResonatedNo
Muffler Outlet LocationDual
Exhaust TypeCat-Back
Catalytic Converter IncludedNo
Part CategoryPerformance Parts
Hardware IncludedYes
Exhaust Tip WallSingle Wall
Exhaust Tip Quantity2
Muffler Inlet LocationCenter
Exhaust Tip FinishBlack Ceramic Coating
Exhaust Tip EdgeRolled Edge
Valve IncludedNo
Muffler TypeReflection
Pipe Material409 Stainless Steel
Muffler Body Width9.50 in.
Tail Pipe Tapered OutletNo
Muffler Body ShapeOval
Mounting Bracket IncludedYes
Muffler Outlet Quantity2
Muffler FinishBlack High-Temperature Paint Finish
Mount TypeUses factory hangers
Clamps IncludedYes
Muffler StyleOutlaw Series
FinishNatural
Exit StyleDual Out Rear
Muffler Body Height4 in.
Tip IncludedYes
Clamping TypeFlat Band
Muffler Flanged InletNo
Spring Bolt Kit IncludedNo
Muffler SeriesOutlaw
QuantitySold as a Kit
Muffler IncludedYes
Exhaust Tip ConnectionClamp-On
System StyleCat-Back
Tail Pipe Outlet Outside Diameter3 in.
Muffler ConfigurationSingle inlet/Dual outlet
System Material409 Stainless Steel
Valve TypeNot Applicable
Intermediate Pipe Diameter3 in (76.2 mm)
Exhaust Tip Diameter4.50 in.
Part FitmentDirect Fit
Vendor Part Number818192
Package Qty1
Package TypeEA
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