Customer Chris Ramsey’s 750HP SpeedFactory Challenger, shown here winning 2nd place at the “Mopars with Big Daddy” Mopar show at Garlit’s Drag Racing Museum in Ocala, FL. November 8, 2009.

The car was a blast to drive home. Gas mileage did increase to about 22-23 mpg. The ride was very comfortable – firm but no loose play or body roll. The updated suspension really do a lot for the car in terms of giving the driver a much better feel of the road and overall driving experience.

The supercharger. Wow! I can feel the car fighting for traction all the time. I think I’ll have to replace those stock Goodyear Eagle F1’s in about 2 weeks! The power is great though. Very manageable once you learn how the supercharger works and how it’s power is developed. You truly just drive this car around town with no problem. I think I could let my grandma drive this car around town and she would be fine.

Daniel with his Stage 3 Supercharged Challenger

The exhaust has a great sound. Under power with your foot to the floor or just cruising at 75mph. Actually at 75mph you can hardly hear it. I love the sound when you let off the gas and the transmission downshifts on its own.
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Here are few more photos of our custom manifold blower with integrated charge cooler as it is being attached to the motor.

Pull up next to this Challenger at a light and you’ll be in for a surprise. Under that bone stock exterior lies the heart of a beast – a very angry beast. Even if you pop the hood, you won’t see any difference – the beast knows how to hide.

This Stage IV Challenger has a 440 built motor rated at 630 HP (crank), Centerforce clutch, sway bar and springs handling package, beautiful SpeedFactory edition Boze Forged wheels and Bridgestone tires. This 6-speed Challenger also meets California emissions requirements.

See more photos in the gallery.

This blacked-out 900 horsepower Challenger is a force to be reckoned with. It’s a 2009 “one-off” build SpeedFactory Challenger, powered by a 426 Hemi with forced induction through a Vortech V7 Ysi supercharger, passing through a Fat Cat Fabrication custom-built charge cooler. The charge cooler greatly increases the efficiency of the supercharger. This Challenger also has the new 6 speed manual transmission with a 3.92 rear gear ratio.  The wheels are Boze Forged “Shifter” style wheels riding on Mopar coil over suspension and Hotchkis sway bars.

SpeedFactory custom-built charge cooler

Vortech V7 Ysi supercharger

SpeedFactory High Volume Fuel System

Boze Forged "Shifter" style wheels

The 300 SRT8 is Chrysler’s hot-rod version of the 300 luxury sedan. Since the 300 SRT8 shares many LX/LC platform elements with the Charger and Challenger SRT8 models, our packages are a perfect fit for any 300C or 300 SRT8 models.

This Stage 3 Supercharged 300 SRT8 has the Vortech V3 supercharger, coil over suspension, larger sway bars, 355 gears with the new Powertrax differential, long tube headers, six piston 15″ front  and 4 piston 14″ rear brakes (drilled and slotted).

More Supercharged 300 SRT8 photos in the gallery.

The Vortech V3 supercharger is at the heart of the Stage 3 300C package.

SpeedFactory's Stage 3 supercharger package made John's 300 into his dream car.

6 piston, 15" front brakes

4 piston 14" rear brakes

The SpeedFactory Stage 3 Supercharged 300 is a powerful yet elegant statment.

Happy customer Doug from Indiana sent us this note about his Stage 3 Supercharged Challenger:

“I’ve had the car up to 185 mph and it handles just like a dream.  Having my car shipped to Atlanta was like sending one of my kids, I couldn’t wait to get it home.  As soon as it was off the trailer it was time to put it to the test.  As my neighbors watched I prepared them for a NASA take-off. I stomped on the accelerator and all I could see was smoke from the tires burning off of the rims and my neighbors seemed to disappear in the smoke. I looked at Mark and said “that’s what it’s all about” with a smile from ear to ear.”

Doug’s SpeedFactory Challenger features the Stage 3 Supercharger package with some options including the Mopar T-shifter handle and pillar gauges. See more photos in the gallery.

Happy customer Brad from Michigan says “I bought the car site unseen. SpeedFactory delivered it to me complete, and I’m happy as hell and it’s fast as hell!”

Nothing is better than American-made muscle. Speedfactory is proud to use American-made products and partner with US-based companies, not only because it’s good for business, but because these products and companies are some of the best in the world.

And while you chew on that, you might enjoy looking at the Speedfactory Stage III 426 Hemi Stroker package with classic Hemi style valve covers and relocated factory ignition coils. It also has a Speedfactory cold air intake, American Racing headers and Magnaflow exhaust. Engine is rated at 587 HP / 560 ft. lbs of torque. Can you say fun?

Speedfactory Stage III 426 Hemi Stroker motor passenger side view

Speedfactory Stage III 426 Hemi Stroker motor driver side view

Speedfactory Stage III 426 Hemi Stroker motor front view