One of the best ways to increase performance is with high flow cat headers. The stock M5 and M6 headers are small diameter and restrictive which robs your car of horsepower. Agency Power has released a performance header that utilizes high flow cats and larger diameter pipes. This combination allows the exhaust to travel into the rest of the system much faster and carry more heat away from the engine.

Constructed of 304 stainless steel and mandrel bends, the Agency Power header is among the best performing on the market. When coupled with supporting mods, the Agency Power High Flow Cat headers are capable of producing upwards of 50whp. Another great advantage to the Agency Power high flow cat headers is the weight reduction they offer, a difference of 10lbs.

No check engine light will occur and no ECU modifications are needed.

Agency Power High Flow Cat Headers BMW E60 M5 E63 M6 05+

All Agency Power products come with a limited lifetime warranty.

The first option is with the bypass valves closed. The result is an exhaust performance and sound level just above the factory exhaust system. Overall, exhaust is sporty and perfect for daily driving in this mode. With the push of a button, the bypass valves open and allow for a full free flowing exhaust to open up and allow the Ferrari to perform like a track car. Horsepower, torque and exhaust tone all increase. In this mode, the exhaust note is aggressive and attention grabbing.  The muffler bypass mode will give your 360 a truly exotic tone.

This Agency Power electronic valve controlled exhaust consists of 2.5″ stainless steel pipes that are tig welded.

Included:

• Electronic and vacuum components
• Remote key fob and control box
• Your choice of either quad 90mm polished silver or matte black round tips
• All the brackets, clamps and bolts

As an Option, you can have this exhaust finished in either black, white or gray ceramic coating. This coating helps the system to evacuate the exhaust more efficiently and cuts down on engine bay temps.

Here are some videos posted by a recent Agency Power Customer:

STOCK EXHAUST SOUND CLIP:

AGENCY POWER EXHAUST SOUND CLIP:

BEFORE:

AFTER:

AGENCY POWER BMW 335I EXHAUST SYSTEM (click here for info!)

The BMW 335I twin turbo vehicle is one of the hottest new tuner cars to hit the market. With any vehicle at this caliber, performance modifications come naturally. With the need to increase performance, Agency Power has engineered, tested, and released this exhaust system for the 335I coupe. Gaining horsepower and torque, this elegantly finished exhaust has a racing sound that any BMW driver desires. The exhaust is made out of 321 stainless steel. Completely polished from head to toe, the exhaust also features dual stainless tips. The exhaust has twin 2.5 inch piping from the factory catalytic converters back.

To gain the best sound and performance, Agency Power uses a single canister muffler design that chambers the exhaust flow. Dyno tested and daily driven, this exhaust system is the first step in your BMW 335I power modifications. This exhaust fits the 2007+ Coupe Only. Please see our attached dyno sheet and sound clip to get your engine going!

Here is the details:

Chevrolet Camaro SS Exhaust including X-Pipe

Since the first model year of the Chevrolet Camaro in 1967, enthusiasts have been modifying and taking great pride in their Camaro’s performance and racing ability.  5 generations later and made hugely popular from the blockbuster movie, Transformers, the new 2010+ V8 Chevrolet Camaro is one of the hottest new performance cars.  With any big block engine, there is more power to be had.  Agency Power has accomplished not only a great power adder for the Camaro SS, but something to make it sound like a mean racing machine as well.  The new catback exhaust from Agency Power fits the 2010 and up V8 Camaro SS.  The full exhaust system includes the X-Pipe as well.  To tune the exhaust to give it that perfectly balanced exhaust tone, we use twin cylinder mufflers equipped with 2.5 inch 304 stainless steel.  The entire exhaust system has been TIG welded and then polished to a show finish and something you will enjoy looking at for years to come.  Giving the exhaust a tough stance out of the back bumper outlets are 2 4.5 inch round tips etched with the Agency Power logo.  This exhaust has been designed, built, and tested here in Arizona.  To show what our exhaust system would do on a completely stock Camaro SS, we strapped it down to a Mustang Dyno.  The exhaust added an impressive 20 rear wheel horsepower and 31 ft/lbs of torque.

The Agency Power catback exhaust system for the 2010+ V8 Camaro SS is a great way to add style, performance, and a much needed improved sound to your car.  Please check out the attached pictures and view our sound clip.  All Agency Power parts come with a limited lifetime warranty.

Here are the details:

2011+ Agency Power Ford Mustang GT 5.0 Exhaust

Agency Power created an exhaust system that portrays the right exhaust note without sacrificing power on the naturally aspirated motor. The 3″ stainless steel piping and dual muffler design gives the Mustang GT a true race quality sound without robbing the car of performance. Like all Agency Power exhausts, durability and look are just as important as power and sound. The dual exhaust is TIG welded and finished with a mirror polish that is enhanced by the 4″ round exhaust tips.

From the factory, the Mustang is mild and leaves you wanting more. With the Agency Power exhaust, your grip tightens and heart races as you fly through the RPM range. And if that wasn’t enough, a lift of the throttle unleashes a growl that lets everyone know, your car means business. Power gains of 10hp and 20tq to the wheels throughout the power curve is yet another reason you need to bolt on the Agency Power Race Tuned exhaust to your 2011 Mustang GT.

• Agency Power GT30R Rotated Turbo Kit(includes downpipe with open dump pipe, Short Ram Intake)
• AP Front Mount Intercooler Kit
• AP Turbo Back Exhaust
• AP Blow Off Valve
• AP Fuel Rail
• AP Fuel Distribution Block
• AP Fuel Lines
• AP Alternator Cover
• AP Silicone Hoses
• AP Intercooler Piping
• AP Springs
• AP Rear Sway Bar

The car is still being tuned on the dyno but so far it has made 460 horsepower at the wheels on a Mustang 4 Wheel Dyno on 91 pump gas.  This was at a conservative 15-16 psi boost.  The torque was 400 lb/ft.!

(CLICK ON ANY OF THE ABOVE PRODUCTS TO SEE MORE INFORMATION)

(VIDEO OF DYNO TUNING RUNS AT BOTTOM OF POST, DON’T MISS IT!)

Now for some quick photos of the build:

1)  HERE’S A COUPLE SHOTS OF THE PROJECT 2008 SUBARU WRX SEDAN WITH THE AGENCY POWER KIT INSTALLED

2) HERE’S THE TINY FACTORY TURBO, INTERCOOLER, AND CHARGE PIPE

3) CLOSEUP OF ROTATED TURBO AND PIPING

4) GT30R TURBO

5) AP Fuel Rail

6) AP Fuel Line Closeup

7) AP Lightened Flywheel

AP Alternator Cover

9) AP Front Mount Intercooler Installed

10) AP Fuel Distribution Block

11) AP Manual Boost Controller

12) AP Turbo Back Exhaust

13) AP Downpipe with Dump Pipe

14) A look from the bottom of the car

YOUTUBE VIDEOS OF THE DYNO TUNING:

Agency Power designs and dyno tests it’s intake systems in house, in the USA. As new popular models come out, Agency Power is busy finding more horsepower and torque with its products. Every new product is tested on their in house Mustang Dyno for customer satisfaction.

Vehicles need more air flow to make more power. Not only is air flow important, but how that air gets into your car’s motor is an essential factor. With vehicle computers becoming more and more advanced, precision engineered products are necessary to optimize performance. Focused on quality, function, and style, Agency Power has developed a full line of high quality intake systems for today’s popular models.

Agency Power’s intake kits feature quality materials like CNC aluminum, carbon fiber, silicone couplers, and strong clamps. To keep the cool air separated from the engine heat when necessary, Agency Power has developed heat shields which are included in appropriate kits. The heat shields and intake tubes are powder coated in a textured finish. Custom colors are available in certain kits.

Agency Power set out to produce the best exhaust system to appeal to the entire market. The solution is simple, create a high performance, quality built product with variable exhaust sound and performance. That is where this electronic valve controlled system thrives. The Agency Power muffler gives the user the ability to control the performance and sound of the exhaust with the push of a button or throttle position.

Valves mounted near the muffler allow exhaust gases to either pass straight through for performance and a louder sound or be diverted into the muffler for a quieter sound. Constructed with 304 stainless steel and tig welded ensure a quality fit and durability that is an Agency Power standard.

The Agency Power electronic valve controlled exhaust is a must for both the street and the track.

In addition to the Valvetronic line of exhaust, Agency Power continues to manufacture exhaust systems for hundreds of popular models.