| DYNO PROVEN TO PROVIDE THE LARGEST HORSEPOWER GAINS FOR YOUR SHELBY GT500
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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 Ford Shelby GT500.
We have invested many hours evaluating and refining each of the Shelby GT500 products on our chassis “dyno”, to ensure that we could develop as much power as possible, as safely as possible.
End result is our now available "Dyno Tuned Options".
Our 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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SLP STAINLESS STEEL POLISHED CERAMIC 1-3/4' FULL LENGTH HEADERS
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RPM Outlet is proud to introduce a new and exciting product from SLP, their newly designed, precision-engineered STAINLESS STEEL polished ceramic Full Length Headers
Now owners of the 2007 MUSTANG SHELBY GT500 can now bolt-on major horsepower and torque increases while maintaining OEM quality and reliability
for everyday street use. SLP full-length Header and PowerFlo-X Crossover Pipe systems have delivered consistent gains
of 28-38 rear wheel horsepower, and ft./lbs of torque when tested by such magazines as 5.0 and Muscle Mustangs & Fast Fords.
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| Built from computer mandrel-bent 1 3/4" primaries and venturi-style velocity collectors, 3/8" thick laser-cut flanges, and standard polished ceramic finish, these systems deliver un-matched quality at very affordable prices. PowerFlo-X Crossover Pipe also available to make installation a direct bolt-in procedure.
SLP 1 3/4" Full Length Headers Feature:
- Mandrel bent 1 3/4" 304 stainless steel primary tubes
- Aluminum-ceramic-coated to keep heat in, exhaust velocities up, and under-hood temperatures down
- Single Port Flanges prevents gasket falure
- Compatible with all factory emissions equipment
- Complete with nuts, bolts, hardware, and 02 harness extensions
- Includes detailed instructions and all necessary installation hardware—no additional fabrication required!
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| SLP MANDREL-BENT 304 STAINLESS STEEL POLISHED CERAMIC 1-3/4' FULL LENGTH HEADERS |
| Part # |
Year |
Engine |
Application |
Price |
| SLPM30006 |
07-09 |
5.4L-4V |
Stainless Steel Polished Ceramic Full Length Headers
- Mandrel bent 1 3/4" 304 stainless steel primary tubes
- Aluminum-ceramic-coated
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$ 769.99 |
| SLPM31534 |
07-09 |
5.4L-4V |
2½ PowerFlo-X Crossover Pipe, Short Assembly w/Cats
(for long-tube header style)- Shelby GT500 Specific, T-304 Stainless Steel
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$ 349.99 |
Click-On Price to Order
PowerFlo-X Crossover Pipe, Full Assembly
Free breathing and more power for your Shelby.
The SLP GT500 X-pipes use free-flowing mandrel-bent tubing and a genuine X crossover to provide a significant horsepower increase over the restrictive stock cat pipes.
SLP gave them a three-piece design for versatility and easy installation;
FEATURES:
- Exclusive three-piece "modular" design makes it possible to upgrade to SLP Long-Tube Headers without purchasing a new X-pipe
- Includes band clamps for easy interchangeability of cats and race pipes
- Equipped with a true X-pipe crossover, not a poor-flowing clamshell imitation
- Constructed with stainless mandrel-bent pipe
- Equipped with factory O2 bungs
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NOTE: Includes detailed instructions and all required installation hardware.
| PowerFlo-X Crossover Pipe, Full Assembly |
| Part # |
Year |
Engine |
Application |
Price |
| SLPM31540 |
07-09 |
5.4L-4V |
2½ PowerFlo-X Crossover Pipe, Short Assembly w/Cats
(for long-tube header style)- Shelby GT500 Specific, T-304 Stainless Steel
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$ 399.99 |
Click-On Price to Order
| DISCLAIMER:
This product is not legal for sale or use on any pollution controlled motor vehicles.
Legal in California only for racing vehicles which may never be used on U.S. highways. Not legal for sale or use in the state of California, nor in states which
have adopted California emission standards. |
SLP Axle-Back Exhaust, Loud Mouth™/Power-Flo™, Shelby GT500
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SLP Performance modular cat-back exhaust systems are built from aircraft-quality T-304 stainless steel -- stainless inside and out,
not mild steel, not aluminum, not coated aluminum, not just wrapped with stainless on the outside for show.
Your ’05 GT packs a 300-horse thoroughbred of an engine. Why bottle it up with restrictive, wimpy-sounding stock mufflers? Unleash the stallion within, with a Loud Mouth rear-section exhaust system from SLP Performance Parts. This affordable, easy-to-install kit eliminates the factory mufflers entirely, drastically reducing backpressure for enhanced power and fuel economy.
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SLP " LOUD MOUTH "
05-07 Mustang GT/Shelby GT500:
- Mandrel-bent 2.5" tubing offers unbeatable flow characteristics
- Significantly lighter than the OEM muffler assembly
- Installs in under 30 minutes
- Constructed entirely from 304 stainless steel
- Hand-polished, 3.5" dual-wall tips provide a show-quality appearance
- Emissions legal in all 50 states
- Includes pre-welded hangers, detailed instructions, and all necessary installation hardware
- Covered by SLP’s Performance Guarantee and limited lifetime warranty
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>>>GUARANTEED LOWEST PRICE<<<
Prices No One Can Beat
We'll beat any advertised price on listed Stainless Exhaust Systems and ship it Ground UPS FREE! * Continental U.S. Only
| Part # |
Year |
Application |
Price |
| SLPM31014 |
05-07 |
SLP " LOUD MOUTH "- LOUD MOUTH Mufflers
- Mandrel-bent 304 Stainless Steel Tubing
- 3.5" double-wall T-304 tips with electromarked SLP logo
- Lifetime Warranty
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$ 339.95 |
Click-On Price to Order
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SLP " POWER-FLO "
05-07 Mustang GT/Shelby GT500:
- Power-Flo mufflers offer minimal flow restriction and a deep, rich performance sound
- Lighter than the OEM muffler assembly
- Installs in under 30 minutes
- Constructed entirely from 304 stainless steel
- Hand-polished mufflers and 2.5" dual-wall tips provide a show-quality appearance
- Emissions legal in all 50 states
- Includes pre-welded hangers, detailed instructions, and all necessary installation hardware
- Covered by SLP’s Performance Guarantee and limited lifetime warranty
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>>>GUARANTEED LOWEST PRICE<<<
Prices No One Can Beat
We'll beat any advertised price on listed Stainless Exhaust Systems and ship it Ground UPS FREE! * Continental U.S. Only
| Part # |
Year |
Application |
Price |
| SLPM31012 |
05-07 |
SLP " POWER-FLO "- POWER_FLO Mufflers
- Mandrel-bent 304 Stainless Steel Tubing
- 4.0" double-wall T-304 tips with electromarked SLP logo
- Lifetime Warranty
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$ 449.95 |
| SLPM31013 |
05-07 |
SLP " POWER-FLO "- POWER_FLO Mufflers
- Mandrel-bent 304 Stainless Steel Tubing
- 3.5" double-wall T-304 tips with electromarked SLP logo
- Lifetime Warranty
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$ 431.95 |
Click-On Price to Order
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Aluminum Coolant / Fill Tanks 
Stainless Steel Hood Pin Kits 
Mustang GT Start Button Kit 
A Better "Brake Line Loc " Kit
TRUEFLOW 114mm MAF / Cold-Air Kit
K&N Gen. II FIPK® (50+ hp)
Battery Box and Relocation Kit
ERADISPEED Plus Rotors 
PREDATOR Tuner (27+hp) 
LIVEWIRE/X3 Flash Tuners
Special Forces Tuning Software 
PRO SERIES Performance Radiators
160º/180º LOW TEMP T/Stats
Purple Ice® coolant additive 
LAKEWOOD Driveshaft Safety Loop Kit
Rear End Girdle and Stud kit 
DYNO TUNED POWER OPTIONS™
Stage I/II/III Camshafts/Spring
Stage I/II/III Camshafts/Spring
1-7/8 Stainless Long-Tube Kit
Ceramic Long-Tube Header Kit
409 Stainless Axle-Back™
T-304 Stainless Axle-Back™ Kit
American Thunder Axle-Back™ Kit
Stainless Axle-Back™ Kits
Stainless Mid-Muffler True Cat-Back
Wideband air/fuel with data-logger
Wideband air/fuel with data-logger
Full A-Pillar, Pods, Clusters 
DIGITAL DIS-4 Ignition Kit
DIGITAL HyFire VIII CD Ignition
DIRECT-FIRE 3V Modular SuperCoils
Copper / Iridium Spark Plugs 
™ Nitrous Oxide Systems (35-175 hp)
Nitrous Oxide Systems (75-175 hp)
FRONT-END Alignment Kit
Caster/Camber Plates / Coil-Over Kits
GT500 Performance Shifter Kit 
Pistol-Grip / T-Handle Shifter Handles
RST/RXT Dual Clutch/Flywheel Kits
STREET-PAC