New Product Evaluation: MRT Exhaust and Cold Air Kit

Kenny Brown Evaluates the “Punch Factor” to MRT's New Exhaust System for '05 Mustang at Autobahn Track


May 21, 2006, Autobahn Road Course, Joilet,Illinois -- More Power, More Power, More Power seems to be what every body wants in their muscle car. This always reminds me of a big sign hanging in Charlie's Speed and Machine back in Omaha in the early ‘70s – “Speed Cost Money - How Fast Can You Afford to Go!” That's a truism that hasn't change in 30+ years. What has changed though, are the cars. With all the electronics and sealed systems, making big power now days requires a big investment. Fortunately, there are some more affordable options for the power-craved on a budget and I've tested a couple of good ones from MRT (Mustang Racing Technologies


Let's start with the basics: Horsepower is made when air and fuel are sucked into the engine, combusted then exhausted out. So it's safe to conclude you'll make more power by getting more air and fuel in and letting more exhaust out.


The SVTOA Autobahn event in May was only a test session (and of course a little therapy for me) so big power wasn't needed or even on my radar. Now the thing about my track cars over the years that I have repeatedly demonstrated is if you have a good chassis, suspension and brakes (or if you own one of my track cars) you don't need a bonsai horsepower engine to be really quick, just solid reliable power. (Key word is reliable , you can't be driving on the track if you're broken down in the pits!) Even so it's always nice to have a little more punch when you need it.


Scott (owner of Mustang Racing Technologies) and the boys at MRT were quick with a solution -- their exclusive Cold Air Intake Kit, stainless steel “High-Flow” H-Pipe and AeroTurbine Axle-Back exhaust system . These are a couple of simple ways to boost power without breaking the bank. Besides, their exhaust sounds really awesome and the carbon fiber intake looks very cool!


Because we were going to the track, Scott opted for custom calibration on the Mustang™ Dyno, to take full advantage of the freer flowing intake and exhaust to optimize performance. A couple of hours, a lot of noise and two pizzas later a fire breathing monster was born. Well not really, but we did make some really nice and very driveable (very important) gains in power and torque ( see dyno chart ).


The MRT Cold Air Kit is pretty cool. First of all it looks nice, very neat and tidy plus the chrome air tube and shiny carbon fiber really dress up the Mustang's engine bay. Also the air box itself has better segregation of cold in-bound air from the hot under hood air that I've seen in other “cold-air” units * (see note) and that's a big plus. What Scott told me makes the MRT system different and better, is that they invested a lot of work on the air flow path from filter to throttle, increasing flow without upsetting the OE “flow-path” the processor needs to run correctly. According to Scott this makes it the only aftermarket cold air box for new Mustangs that is a true bolt-on -- no reprogramming required. However, there are still more gains to be made if you do recalibrate after installing the kit.


* Note: There are a lot of the cold air kits on the market today that only make their “advertised” power gains when the hood is up – with cool air from outside flowing straight onto the air filter. How often do you drive around with your hood up? Close the hood and the vast source of cold air is blocked off, and hot under hood air seeps in around the edges to take its place, hurting power. That's not speculation, it's something I have proven on the Dyno.


Now swinging around to the backend of this horse, with confidence I can tell you that the MRT AeroTurbine axle-back system along with the MRT stainless steel “Max-Flow” H-pipe sound great and makes good, reliable power and has a great seat of the pants feel. I had many people come up to me at the track and tell me how good the exhaust sounded – for a street car.


Now most vehicles have extreme restrictions on exhaust airflows, which increase exhaust temperatures and decreases engine longevity.  The AeroTurbine breakthrough literally takes the incoming exhaust air stream and splits it via an airfoil cone with an orifice similar to a jet engine.


The air begins to spin because of the increase velocity and pressure transfers.  The outer air stream then accelerates as it recombines with the inner air stream.  A vacuum is created that muffles the exhaust sound and increases the exhaust flow; thus, allowing your engine to breathe easier and dramatically increases performance.  The AeroTurbine allows the more efficient combustion to create added power instead of simply dumping more fuel into your engine. MRT applied their engineering knowledge and Mustang enthusiasm to design and development this custom 2005+ Mustang MRT AeroTurbine axle back system.


The MRT Stainless Steel "MaxFlow" H-pipe further improves the performance and changes the exhaust sound to that low deep tone that H-pipes are known for. Dyno-testing showed a 9 RWHP gain on a STOCK GT with just the MRT H-pipe. Another big plus for MRT is all their products come with all necessary hardware, plus the H-pipe comes with a new OEM Manifold flange gasket, so there's no messing around when it comes time to install.


If you need to know more, just call the boys at MRT and tell them Kenny Brown sent you (248.960.8813) or go to From my perspective the exhaust sounds great and just works, which is good because I'm a results kind of guy.


MRT has Cold Air Kit and AeroTurbine axle-back system for the V-6 Mustang too.