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Vehicle Info NeededDYNOMAXPART NUMBER: 289-39454
Cat-Back Exhaust System Ultra-Flo Stainless System
$46299
Ships on 09/14/2026
Lowest Price GuaranteeGM
- Cat-Back Exhaust System
- Ultra-Flo Stainless System
- 2007-08 Silverado/Sierra 1500
- 4.8L/5.3L 2wd/4wd
- Crew Cab Short Bed
- Extended Cab Standard Bed
- 143.5" Wheelbase
- Single Side Exit
- 4" Polished Stainless Tip
Dynomax's Ultra-Flo Stainless system is a Single 3" Cat-Back System with a 4" Polished Stainless Steel Tip and a Ultra Flo™ Welded Muffler. Dyno test show an increase of 9 Horsepower and 14 Lb-Ft. of Torque.
Part TypeExhaust System
BrandDYNOMAX
Package Height15.0
Package Width18.0
Package Length59.0
Weight49.8 PG
Part CategoryPerformance Parts
Hardware IncludedYes
Tip IncludedYes
Tailpipe Diameter (In.)3
QuantitySold as a kit
Tip CutSlant
System FinishNatural
Muffler IncludedYes
Muffler QuantityOne
System StyleCat Back
Muffler ConfigurationSingle inlet/Single outlet
System MaterialStainless steel
Exit LocationPassenger side
Exit QuantityOne
Tip MaterialStainless steel
Tip Edge StyleNon-rolled edge
Tip QuantitySingle
Muffler StylePerforated tube
Inlet QuantityOne
Tip ShapeRound
Tip Outlet Size4 in (101.6 mm)
Intermediate Pipe Diameter3 in (76.2 mm)
Exhaust TypeSingle
Vendor Part Number39454
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
