RPM Outlet - We Take The Guesswork Out Of Performance Parts!
  DYNO PROVEN TO PROVIDE THE LARGEST HORSEPOWER GAINS FOR THE 05-08 MUSTANG 4.0L
How fast is our 05 GT? Click-here to find outSTRATEGY

In keeping with our goal of providing our customers with the best possible value, we have tested a large group of components specifically designed for the 4.0L V6 Mustang.

We have invested many hours evaluating and refining each of the 4.0L V6 Mustang products on our MD Chassis Dyno, to ensure that we could develop as much power as possible, as safely as possible.

The site menu on the left side of this page, lists the clear winners when it comes to “performance vs. dollar” value. Please check back often as we are always developing new ways to create more horsepower.




Pypes True-Dual System w/ Street-legal X-pipe
05-08 Ford Mustang 4.0L V6
(allows V6 owners to convert to a 50 state smog legal true-dual exhaust system)

in stock

100% Stainless True-Dual Converter Back Exhaust!

True-Dual stainless steel 2-½ inch converter back exhaust with 4-inch polished stainless steel tips

Now you can have the look and sound of the V-8 without the expensive muffler shop or over prices exhaust manufactures.

This is with out a doubt the most IMPRESSIVE sounding & highest HP Converter Back system available on the Market Today!!

Pypes Stainless True-Dual 2-½ inch converter back consists of their 2-½ emissions legal x-pipe with their 2-½ mandrel bent tail pipes, 4-inch polished stainless steel tips and all needed OEM quality clamps, hangers required to do a complete installation.

This kit is a direct replacement that converts your V6 mustang converter-back into an emissions legal True-Dual x-pipe, converter back exhaust system!

Installation of this kit is quite simple includes all of the special parts needed and should take no more than 2 hours to complete.


in stock
    Features:

  • Complete kit with detail installation instructions

  • Stainless mandrel-bent over axle pipe

  • Stainless X-Crossover pipe

  • 4" polished stainless steel tips

  • Pypes Street-PRO/Violator mufflers

  • Clamps, hangers and hardware

  • Slip-fit for ease of installation

  • 50 state smog legal

  • Everything needed to do the job!

Part # Year Part Description Price
  PYP-SFM68 05-08
    Pypes True-Dual X-Pipe Back System
  • Stainless Steel Street-PRO series mufflers (mild tone)
  • Stainless Steel Street-legal X-pipe, Mandrel-bent over-axle pipes
  • 4" polished stainless steel tips, clamps, hangers and hardware
$ 339.99

Click-On Price to Order

$39.99 U.P.S. Dimensional weight/Fuel surcharge applies to all diesel exhaust system orders.

* Note : 07½ models require #PYP-HFM-60 hanger kit.




JBA Stainless Exhaust Selection
Designed for the Ford 05-08 Mustang 4.0L V6

in stockin stockin stock


  JBA Stainless Exhaust Systems
Part # How To Description Price
  JBA40-2628 Click-Here for Instructions
    JBA Single Side Axle-Back, Rear Exit
  • 50 state smog legal CARB E.O.# D-216-28
$ 199.99
  JBA40-2830 Click-Here for Instructions
    JBA OE-connector Dual Rear Exit Stainless Exhaust System
  • Stainless OE-connector pipe Mandrel-bent over-axle pipes
  • Stainless JBA Mufflers w/4" polished stainless steel tips
  • OEM hardware kit with detailed installation instructions
$ 559.99
  JBA40-2831 Click-Here for Instructions
    JBA True-Dual Rear Exit Stainless Exhaust System
  • Stainless H-Pipe w/Mandrel-bent over-axle pipes
  • Stainless JBA Mufflers w/4" polished stainless steel tips
  • OEM hardware kit with detailed installation instructions
$ 599.99

Click-On Price to Order

FREE U.P.S. GROUND SHIPPING - * Continental U.S. Only

* Note : 07½ models require #PYP-HFM-60 hanger kit.




FLOWMASTER American Thunder Axle-Back Kit
05-08 Mustang 4.0L V6

in stock FLOWMASTER American Thunder Mustang Exhaust

Flowmaster announces the release of their new axle-back kit for the 05-08 Ford Mustang. It features a pair of specially-designed 5" X 10" muffler, which provide minimal interior resonance while delivering a deep and aggressive exterior tone. Through extensive testing this kit has shown impressive horsepower and torque gains. It features Flowmasters fully welded chamber mufflers and polished T-304 stainless steel tip. Hangers are pre welded in place to use the factory mounts.

With a slip fit connection - The kit installs easily, and comes complete with hardware and installation instructions. The kit is finished off with a 3.50-inch, stainless, embossed exhaust tip. This system can be installed in less than 1 hour. Get the power, sound and quality you need with a FLOWMASTER American Thunder Exhaust!

How does it Sound?

Part # How-To Part Description Price
FLO-17421 Click-Here for Instructions
    FLOWMASTER American Thunder Axle-Back Kit
  • American Thunder 5 x 5 Muffler
  • T-304 polished stainless tips
  • Complete with OEM hardware
  • Installed in less than 1 hours
$ 229.99

Click-On Price to Order

FREE U.P.S. GROUND SHIPPING - * Continental U.S. Only

* Note : 07½ models require #PYP-HFM-60 hanger kit.




Magnaflow Performance CAT-BACK
05-08 MUSTANG V6


MagnaFlow P/N16605 direct replacement cat-back exhaust shown in this image

MagnaFlow Direct Replacment Cat-back Exhaust
100% Stainless Steel

    MagnaFlow Cat-back™ Feature:

  • Mandrel bent Stainless Steel Pipes

  • 100% T-304 stainless steel

  • Adds up to 11 horsepower

  • 4.0 inch Polished Stainless Steel Tips

  • Direct Replacment Cat-back Exhaust

  • Complete with brackets, nuts, bolts, hardware and detailed instructions
MagnaFlow P/N15889 OE axle-back exhaust shown in this image
Part # Application Price
MAG-15889 MagnaFlow Axle-Back Kit
Polished Stainless 3.5" tips
$279.95
MAG-16605 05-08, 4.0L V6
MagnaFlow Direct Replacement
Cat-back Exhaust
$ 496.95
    Pypes #PYP-HFM-60 Stainless Hardware
  • 304 Stainless Exhaust Hanger clamps
  • Detailed install instructions
$ 49.95

Click-On Price to Order




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