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2 Our best pass to date was this 8.95 at 81.75 mph in the eighth-mile we ran at the local Lakeland Drag Strip. Equating to a 14.30 or so in the quarter, this elapsed time is not bad for a 4,100-pound luxury car, but we should see a nice improvement once our supercharger is in place.

5 There are various fasteners holding the front fascia onto the car, even plastic rivets that must be drilled out. The instructions clearly outline how to accomplish this procedure, and new rivets are included for reassembly.

6 Eventually, the fascia can be removed after unplugging the fog-light wiring harness. This may seem extreme, but it's the easiest way to access the radiator and the area where the intercooler will fit.

vehicle, not to mention the power of the 5.7-liter Hemi engine. After several months of driving, however, we knew we simply wanted more horsepower and torque than our factory Hemi was giving us. Knowing our friends at ProCharger had spent extensive time developing their gear-driven centrifugal superchargers for the new Hemi, we called to see what they had for the new Challenger.

As one of the leaders in Mopar supercharging systems, ProCharger was one of the earliest manufacturers to provide complete supercharging kits for the new Chrysler 5.7- and 6.1-liter electronically fuel injected Hemi engines. Since then, they've made hundreds of dyno pulls on their chassis and engine dynos, refining supercharger technology for the new Hemi. Their centrifugal superchargers and associated hardware have outstanding fit and finish, and mount under the hood for a clean, OEM look. During previous installations we've learned that ProCharger really does their homework, designing powerful supercharger kits that don't sacrifice drivability or reliability, so when they told us they had a new HO intercooled system for our '09 Challenger that would add about 100 additional rear-wheel horsepower at only six pounds of boost, and that they were willing to prove it on our chassis dyno, we had to take them up on the offer.

ProCharger actually offers two levels of miiiiiiiiiiiiiiiL

performance for the new Hemi, the HO and the Stage II, but we decided their HO system would best suit the needs of our daily driver. The HO system offers intercooled performance, and utilizes ProCharger's P-1SC-1 supercharger to make six pounds of boost for an approximate 100 rear-wheel horsepower gain. Other nice features of the HO kit are the simplicity of a shared serpentine belt drive, and the fact that other than swapping the injectors, no fuel system modifications are necessary. Once installed, the supercharger and related bracket and components look as if they could have been installed at the factory, and even the stock engine cover is retained though slightly modified.

When the kit arrived at our shop, we unpacked it and found everything to be nicely protected in the shipping containers. We ran the baseline dyno test on our Challenger (which is modified with a Magnaflow cat-aft exhaust system and K & N cold air kit) the day before we planned to install the kit, making 309 horsepower and 333 lb/ft of torque at the rear wheels. Once Jeff Lacina and Shannon O'Connor from ProCharger arrived, we unpacked the parts and started the installation. Besides removing the car's front fascia, which really isn't that big a deal, the supercharger kit simply bolts on with basic hand tools. Since balancer/lower pulley on the new Hemi is only pressed into place on the crankshaft, with a bolt, but no keyway, ProCharger sends a pinning kit with the necessary drill bit, fixture, and pin to prevent the balancer from slipping on the crank.

We found the kit to be well thought out and nicely engineered, and basically watched and took pictures as the ProCharger team had our system installed easily in about 8-10 man hours. Since we began the project in the afternoon, we had time to finish the installation the next morning, upload the new Diablosport tuning, then test drive and dyno the car in the afternoon. The ProCharger kit included everything we needed, and the car fired immediately after the work was complete, sounding crisp. Since our car is a daily driver, we chose the quiet gear drive option so that with the hood shut, there's no indication of the power-adding air compressor hiding underneath.

Taking the Challenger for a test drive, we immediately notice the improved throttle response and increased power, demonstrated by the ability to fry the tires at will with the traction control off. Otherwise, the Challenger was docile and drove just as it did before the installation, until the throttle is opened. Follow along as we show you how easy it is to install the ProCharger kit for impressive horsepower gains, then back up our gut-feeling of power with dragstrip and dyno testing.

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