Michael Galimi
May 1, 2005

Cold-air induction kits are nothing new. They've been around the Mustang scene in one form or another for quite some time. Cold-air kits are usually successful in adding power because they smooth the path of the airflow to the throttle body. The factory inlet tubes are usually made from rubber, make strange bends, and are often narrow. In contrast, most cold-air kits feature smooth, contoured tubes, which enhance airflow.

C&L Performance knows a lot about getting air to the throttle body due to its many years of experience in designing and manufacturing mass airflow meters and inlet kits. That's why we were anxious to test its latest TrueFlow MAF kit, which is available for many applications and replaces the factory rubber elbows with a better flowing setup.

To get the skinny, we went to Justin's Performance Center in Glen Burnie, Maryland, to wring out C&L's latest, which is designed for '03-'04 Mach 1s. The package uses a TrueFlow inlet pipe along with an aluminum mass airflow sensor housing. The installation is straightforward and simple, and we loved that C&L retains the Shaker hood setup. As you know, the Shaker provides a ram air effect, it delivers cold air to the Four-Valve engine, and it looks good.

As for the results, they were interesting to say the least. Peak power numbers increased by 9.78 hp at the rear wheels. We went from a peak reading of 263.75 hp to 273.53. But the true story laid in the middle of the horsepower curve as we saw increases as high as 12 hp at several points. The torque side of the graph was also up, and the peak increase checked in at 8.54 lb-ft of torque at the tires. Peak torque in stock trim was pegged at 295.22, while the addition of the C&L kit jumped those numbers to 303.76. The mid-rpm improvements were as much as 16 lb-ft of torque at one point--impressive, considering the cost and super-easy installation.

We logged the air/fuel ratio, and we have to admit that anyone who has even an upgraded exhaust system on their Mach 1 will most likely need to add fuel. Justin Burcham confirmed it by saying, "If you do any other modifications, like an after-cat system or pulleys, then you're going to need to add more fuel." Using one of the popular handheld tuners or custom chips will remedy the lean problem on modified Mach 1s. This particular car was slated for a Bassani exhaust system upgrade, and Burcham would be adding fuel using a DiabloSport Predator.

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