| DYNO PROVEN TO PROVIDE THE LARGEST HORSEPOWER GAINS FOR THE 96-04 V8 4.6L MUSTANG GT
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| STRATEGY
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 4.6L Mod Motor.
We have invested many hours evaluating and refining each of the 4.6L 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.
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PYPES 409 STAINLESS 2½ crossover X-PIPE KITS 99-04 MUSTANG GT / Cobra / Mach-1


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Direct Replacement high flow catted crossover X-pipe
So what's the advantage of installing a Pypes 2½ high flow catted X-pipe over other available models?
Simply said, crossover X-pipes create more power and torque than traditional H-pipe or the so called "pro chamber" technology.
H-pipes no longer operate above 3000 rpm and become a non-functional component. Pypes crossover X-Pipe feature 2½ mandrel bent, 409 Stainless Steel pipe
designed to fit in the stock location. Flanges, mounting hardware, O2 sensor rings, reinforcement plates, air tubes and ball flare connections are all standard features
and are designed to fit both stock manifolds, short headers, automatic or standard transmission. Installation is quite simple and should take no more than 2 hours to complete.
| Direct Replacement High-Flow catted, off-road crossover X-pipe |
| Application / Description |
PYPES 409 STAINLESS 2½ CATTED crossover X-PIPE 99-04 Mustang V8 (all)
- 409 Stainless Steel 2½ mandrel bent pipe
- Stainless Premium substrate ceramic cats
- Fits automatic or standard transmission.
P/N PYPXFM36 $ 299.99 |
PYPES 409 STAINLESS 2½ OFFROAD crossover X-PIPE 99-04 Mustang V8 (all)
- 409 Stainless Steel 2½ mandrel bent pipe
- Stainless Premium substrate ceramic cats
- Fits automatic or standard transmission.
P/N PYPXFM16 $ 159.99 |
Ford Oxygen Sensor Extensions, 1 pair
P/N MTB-003322 $ 39.95 |
Click-On Price to Order
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NOTE: For 2004, 02 sensors are relocated. Extensions are required.
PYPES STAINLESS 2½ VIOLATOR SERIES CAT-BACK 100% Stainless Direct Replacement Cat-back Exhaust Kits
What's the secret to the fast-rising popularity of Pypes exhaust systems and components?
Is it some proprietary design that allows a Pypes exhaust system to reduce restriction and increase power?
Is it a highly confidential equation that allows Pypes' mufflers to produce just the right combination of sound and performance? Maybe.
We think the real secret behind Pypes Performance Exhaust's success is that their systems and components offer
all the benefits of typical stainless steel systems. They resist corrosive gasses better than systems made from aluminized
steel or other materials, so they maintain their looks and last longer.
Simply Said; Pypes combines those benefits with a surprisingly affordable price and a lifetime warranty to make them the ultimate in exhaust system value.
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PYPES Cat-back Comparison Chart
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| System Components |
Pypes T-309 |
Magnaflow T-409 |
Bassani T-309 |
| Construction |
304 Polished Stainless |
409 Stainless |
304 Stainless |
| Technology |
Chambered Reversing |
Straight Thru |
Straight Thru |
| Muffler Sounds |
Choice of 3 Sounds |
Choice of 3 Sounds |
Choice of 2 Sounds |
| Muffler Flow |
495 CFM |
495 CFM |
495 CFM |
| System Price |
$369 - $399 |
$399 - $549 |
$699 - $759 |
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| 100% Stainless Steel Direct Replacement Cat-back Exhaust Kits |
| Part # |
Year |
Discription |
Price |
| PYPSFM27V |
98-04 Mustang GT 03-04 Mach-1 98 Cobra |
Pypes T-409 Stainless 2½ Violator Series Cat-Back- Polished Stainless Mandrel Bent Pipe
- Polished 2½ Stainless Violator Series Mufflers
- Polished 3½-inch Stainless Steel Tips
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$ 489.99 |
| PYPSFM16V |
96-97 Mustang GT 96-97 Cobra 94-95 Mustang GT |
Pypes T-409 Stainless 2½ Violator Series Cat-Back- Polished Stainless Mandrel Bent Pipe
- Polished 2½ Stainless Violator Series Mufflers
- Polished 3½-inch Stainless Steel Tips
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$ 489.99 |
| PYPSFM13V |
96-07 Mustang GT 79-93 Mustang LX 5.0L 79-93 Mustang GT 5.0L |
Pypes T-409 Stainless 2½ Violator Series Cat-Back- Polished Stainless Mandrel Bent Pipe
- Polished 2½ Stainless Violator Series Mufflers
- Polished 3.0"-inch Stainless Steel Tips
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$ 489.99 |
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Pypes 304 Stainless Steel Exhaust Hanger Kit- - 99-04 Mustang GT / V6
- - 94-98 Mustang Hanger Conversion
- - 99-04 (V6) with GT Cat-Back Conversion
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$ 39.99 |
Note: All 2004 SOHC and DOHC applications require O2-Sensor Extensions
Click-On Price to Order
FLOWMASTER American Thunder / Force II Exhaust Systems 99-04 FORD Mustang GT/Mach-1/Bullett
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RPM is proud to now offer Flowmaster Exhaust systems in two versions for your Mustang.
Force II Exhaust System:
The Force II exhaust system is designed with the latest exhaust technology available. Through this technology, you will experience improvements in acceleration, passing power, and fuel mileage. The key to these performance improvements is the use of mandrel-bent tubing. The tubing allows for superior exhaust gas flow, while aluminized steel construction has been utilized for its corrosion-resistant qualities. This kit features the 50 Series Delta Flow 3-chamber muffler that'll give you plenty of Flowmaster sound under hard acceleration, but low sound levels while cruising.
American Thunder Exhaust System:
The American Thunder Flowmaster exhaust system is also designed with the latest exhaust technology available. Through the same technology, you will experience improvements in acceleration, passing power, and fuel mileage. Again the key to this performance improvements is Flowmaster's use of mandrel-bent tubing. The tubing allows for superior exhaust gas flow, while aluminized steel construction allows for its corrosion-resistant qualities. Flowmaster American Thunder exhaust systems feature Super 40 Series mufflers that'll give you plenty of that famous Flowmaster sound. Every kit comes complete with all of the necessary hangers, clamps, and mounting hardware for an easy slip fit connection - this system can be installed in less than 1 hour. Get the power, sound and quality you need with a FLOWMASTER American Thunder Exhaust!
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| Part # |
Year |
Application |
Price |
| FLO-17312 |
99-04 |
Flowmaster American Thunder Cat-Back GT/Mach-1/Bullett
- 2.50" Outlets, Super 40 Series Flowmaster Mufflers
- Dual 2.50-inch, mandrel bent aluminized tail-pipes
- Two 3-inch, angle cut stainless steel tips
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$ 489.99 |
| FLO-17215 |
98-98 |
Flowmaster American Thunder Cat-Back GT/Cobra
- 2.50" Outlets, Super 40 Series Flowmaster Mufflers
- Dual 2.50-inch, mandrel bent aluminized tail-pipes
- Two 3-inch, angle cut stainless steel tips
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$ 489.99 |
| FLO-17212 |
94-97 |
Flowmaster American Thunder Cat-Back GT/Cobra
- 2.50" Outlets, Super 40 Series Flowmaster Mufflers
- Dual 2.50-inch, mandrel bent aluminized tail-pipes
- Two 3-inch, angle cut stainless steel tips
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$ 369.95 |
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Pypes 304 Stainless Steel Exhaust Hanger Kit- - 99-04 Mustang GT / V6
- - 94-98 Mustang Hanger Conversion
- - 99-04 (V6) with GT Cat-Back Conversion
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$ 39.99 |
Click-On Price to Order
| Part # |
Year |
Application |
Price |
| FLO-17267 |
99-04 |
Flowmaster Force II Cat-Back GT/Mach-1/Bullett
- 2.50" Outlets, 50 Series Delta Flow Flowmaster Mufflers
- Dual 2.50-inch, mandrel bent aluminized tail-pipes
- Two 3-inch, angle cut stainless steel tips
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$ 399.95 |
| FLO-17114 |
94-97 |
Flowmaster Force II Cat-Back GT/Cobra
- 2.50" Outlets, 50 Series Delta Flow Flowmaster Mufflers
- Dual 2.50-inch, mandrel bent aluminized tail-pipes
- Two 3-inch, angle cut stainless steel tips
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$ 399.95 |
Click-On Price to Order
| MAGNAFLOW TRUE-X CROSSOVER PIPES Note: All 2004 SOHC and DOHC applications require O2-Sensor Extensions
| MAGNAFLOW X-PIPES |
| Part # |
Year |
Engine |
Application |
Price |
| MAG-93335 |
99-04 |
4.6L 2/4v |
Mustang GT, Mach-1 & COBRA2-½ Stainless Steel TubingTru-X Crossover PipeHi Flow Converters |
$ 499.00 |
| MAG-15445 |
99-04 |
4.6L 2/4v |
Mustang GT, Mach-1 & COBRA2-½ Stainless Steel TubingTru-X Crossover PipeWithout Converters |
$ 329.95 |
Click-On Price to Order |
MAGNAFLOW CAT-BACK SYSTEMS (96-04 Cobra / Mach 1 / Mustang GT)
| MAGNAFLOW CAT-BACK SYSTEMS |
| Part # |
Year |
Application |
Price |
| MAG-15671 |
99-04 |
Mustang GT, Mach-1 & 96-98 COBRA- 2-½ Polished SS Muffers
- 2-½ MagnaFlow Stainless Steel Exhaust System
- 3-½ Stainless Steel Tips
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$ 469.95 |
| MAG-15673 |
99-04 |
Mustang GT, Mach-1 & 96-98 COBRA- 2-½ Polished SS Magnapack Muffers
- 2-½ MagnaFlow Stainless Steel Exhaust System
- 3-½ Stainless Steel Tips
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$ 469.95 |
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Pypes 304 Stainless Steel Exhaust Hanger Kit- - 99-04 Mustang GT / V6
- - 94-98 Mustang Hanger Conversion
- - 99-04 (V6) with GT Cat-Back Conversion
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$ 39.99 |
Click-On Price to Order
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