1999-04 Mustang Flowmaster Catted H-Pipe for Shorty Headers w/ Manual Trans 4.6 by Flowmaster

Details   |  Description
  • 1999-2004 Mustang GT 4.6L 2.250" Flowmaster Direct Fit Catalytic H-Pipe, 3-Way Catalytic Converters, 49 State Legal
  • Mustang Direct Fit Catalytic H-Pipe (99-04)
99-04 Mustang Flowmaster Catalytic H-Pipe Side Picture
  • 99-04 Mustang Flowmaster Catalytic H-Pipe Side Picture
  • Rear Shot of Flowmaster 99-04 Mustang H-pipe

Replace your damaged mid-pipe with this 1999-2004 Mustang catalytic H-pipe from Flowmaster!

Item #FLO-2020027
MPN# 2020027

Your Price: $663.36

Market Price:$867.14
You Save 23.50 % ($203.78)

In Stock Ships tomorrow!

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  • 49 State Legal
  • Direct Replacement


  • 4 Catalytic Converters
  • Factory Flanges
  • For Manual Transmission

What's in the Box

  • (1) Catalytic H-Pipe

Made in the USA

Product Description

Flowmaster Quality
If the mid-pipe on your New Edge 99-04 Mustang 4.6 has been damaged, gotten clogged, or rusted out, we have the perfect replacement! This direct fit catalytic h-pipe from Flowmaster features 49 state legal catalytic converters to keep your Mustang passing inspection and smog tests. Installation is easy with the factory style flanges, just simply unbolt your stock mid-pipe and bolt up this replacement! This h-pipe includes 4 3-way converters and features 2.25" piping to get your Mustang back to factory condition.

Fitment Note
2004 year model requires the use of 24" oxygen sensor extensions.

-Fits 1999-2004 Mustang GT w/ Manual Transmission
-Fits 2003-2004 Mustang Mach1 w/ Manual Transmission
-Fits 1999-2004 Mustang Cobra w/ Manual Transmission

Flowmaster Exhaust Warranty - Click Here

Flowmaster EPA Catalytic Converter Warranty - Click Here

-Legal in California only for racing vehicles which may never be used upon a highway.
-It is illegal to remove a properly functioning catalytic converter.
-Not Legal for sale or installation on vehicles operated on public roads in California.

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Vehicle Applications

Ford Mustang - 1999 (99) - 2000 (00) - 2001 (01) - 2002 (02) - 2003 (03) - 2004 (04)

About This Brand

Flowmaster - The Exhaust Technology Company
Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's.

Through use of these dyno's, Flowmaster's engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers "to the ground."

Flowmaster also utilizes Spectrum Analyzers to fine "tune" the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmaster's dedication to quality is what makes them the exhaust industry leader for Latemodel Mustangs and SVT Lightnings!

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