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Cat-Back Exhaust System Ultra Flo Stainless System
Product Discontinued
DYNOMAXPART NUMBER: 289-39490

Cat-Back Exhaust System Ultra Flo Stainless System

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This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

Mopar Cars
    Cat-Back Exhaust System
  • Ultra Flo Stainless System
  • 2009-14 Challenger R/T 5.7L Hemi
  • Dual rear exit
  • 4" x 7" Stainless Steel Tips

    Fits: Challenger R/T 5.7L Hemi
  • 3" Mandrel bent stainless steel tubing
  • Ultra Flo™ Muffler
  • Stainless steel Accuseal™ clamps
  • Single wall stainless steel 4" x 7" tips
  • Limited Lifetime Warranty
  • 90-Day Performance & Sound Guarantee
  • +11 Horsepower & +24 LB-FT. Torque over stock system

    All Dynomax Systems are true bolt-ons designed to attach directly to existing mounting points for easy installation. They follow OE routing with top-of-the-line performance mufflers, mandrel-bent pipes for smooth exhaust flow, and all-aluminized materials for good looks and longevity.

    Dynomax SS Exhaust Systems are made completely from stainless steel. Each kit is dyno proven to make more horsepower & torque. Free-flowing Ultra Flo Welded Mufflers and mandrel-bent tubing increase performance & fuel efficiency.

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    Dynomax Super Turbo systems feature Dynomax's flow director technology with large internal flow tubes that eliminate turbulence and improve exhaust flow while reducing backpressure. The fiberglass matting gives the Super Turbo a mellow performance tone.

    Dynomax Ultra Flo Welded systems feature a stainless 100% welded muffler that uses straight-through design that ensures unrestricted airflow and reduces backpressure. These systems have a deep performance tone.

    Dynomax Ultra Flo systems feature a seamed, unwelded, 100% polished stainless muffler that uses same straight-through design of the Ultro Flo Welded systems. These systems have a deep performance tone and will support up to 1,900 horsepower.

    Dynomax Race Bullet systems feature a lightweight, compact, race-oriented muffler that provides up to a 4 dba sound reduction on most race applications. These systems are designed for vehicles with limited space and produce a deep race tone.


    Looking for bolt-on truck/SUV exhaust applications? Click here.

Part TypeExhaust System
Product LineDynomax Bolt-On Exhaust Systems for Cars
BrandDYNOMAX
Package Height14.25
Package Width18.25
Package Length59.0
Weight77.3 PG
Part CategoryPerformance Parts
Hardware IncludedYes
Tip IncludedYes
Tailpipe Diameter (In.)3
QuantitySold as a kit
Tip CutSlant
System FinishNatural
Muffler IncludedYes
Muffler QuantityTwo
System StyleCat Back
Muffler ConfigurationSingle inlet/Single outlet
System MaterialStainless steel
Exit LocationRear
Exit QuantityTwo
Tip MaterialStainless steel
Tip Edge StyleNon-rolled edge
Tip QuantityDual
Muffler StyleTurbo
Inlet QuantityOne
Tip ShapeRectangular
Tip Outlet Size4.000 x 7.000
Intermediate Pipe Diameter3 in (76.2 mm)
Exhaust TypeDual
Vendor Part Number39490
Package Qty1
Package TypeEA
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