SpeedFactory 426/440 Challenger Packages

Stage 1 Normally Aspirated

475 HP

• SpeedFactory® Cold Air Intake
• Magnaflow® Stainless Steel Cat Back Exhaust
• 180° Thermostat
• Custom Tune
• SpeedFactory® Signature Package:
  • Gauge Cluster
  • Floor Mats
  • Hood/Engine Badging and Serial Number
• Optional Handling Package:
  • Performance lowering springs
  • Sway-bars

Stage 2 Normally Aspirated

500+ HP

• Complete Stage 1 package
• HEMI I Cam
• American Racing® Long Tube Stainless Steel Headers and Mid Pipes
• Optional Head and Intake CNC Porting
• Optional Handling Package:
  • Performance lowering springs
  • Sway-bars

Stage 3 Supercharged

600 HP

• Vortech® V3 Self-Contained Supercharger System (Polished or Satin Finish)
• Air to Water Charge Cooler
• Larger Injectors (Increased Fuel Pressure)
• Vortech® Certified Installation
• 180°Thermostat
• Custom Tuning
• Magnaflow® Stainless Steel Cat Back Exhaust
• 3 Year / 36,000 Powertrain Warranty
• Handling Package:
  • Performance lowering springs
  • Sway-bars
• SpeedFactory® Signature Package:
  • Gauge Cluster
  • Floor Mats
  • Hood/Engine Badging and Serial Number

Stage 4 Normally Aspirated

525 - 630 HP

• 392/426 Short Block w/ Forged Internals
• Optional 440 Short Block w/ Forged Internals
• Melling High Flow Oil Pump
• ATI Super Dampener
• SpeedFactory® Cold Air Intake
• Larger Injectors
• 180° Thermostat
• American Racing® Long Tube Stainless Steel Headers and Mid Pipes
• Magnaflow® Stainless Steel Cat Back Exhaust
• Custom Tuning
• Optional CNC Throttle Body
• Optional Head and Intake CNC Porting
• Optional HEMI Camshaft Upgrade
• Optional Upgraded Torque Converter or Clutch
• Optional Level I Transmission Upgrade for Automatics
• Optional 1000 HP Half Shafts
• Handling Package (performance springs and sway-bars)
• SpeedFactory® Signature Package (Gauge cluster, floor mats, badging and serial numbered)

Stage 5 Supercharged

700+ HP

• Vortech® V3 Self-Contained Supercharger System (Polished or Satin Finish)
• Air to Water Charge Cooler
• Larger Injectors (Increased Fuel Pressure)
• Vortech® Certified Installation
• Short Block w/ Forged Internals
• Optional Head and Intake CNC Porting
• Optional HEMI Camshaft Upgrade
• Melling High Flow Oil Pump
• ATI Overdrive Super Dampener
• CNC Throttle Body
• 180°Thermostat
• American Racing® Long Tube Stainless Steel Headers and Mid Pipes
• Magnaflow® Stainless Steel Cat Back Exhaust
• Custom Tuning and Boost Configurations
• Upgraded Torque Converter or Clutch
• Level II Transmission Upgrade for Automatics
• 1000 HP Half Shafts
• Handling Package (performance springs and sway-bars)
• SpeedFactory® Signature Package (Gauge cluster, floor mats, badging and serial numbered)

SpeedFactory now offers performance enhanced HEMI 5.7 and HEMI 6.1 powered SRT8 Dodge Challengers.

Dodge has made automotive history with the new Challenger and SpeedFactory is tuning into over 4 decades of MOPAR history with these supercharged and NA motor packages.

SpeedFactory works closely with Chrysler Corporation and other high level suppliers including Arrington Engines and Vortech Superchargers to offer many of these premium packages with manufacturer warranties.

SpeedFactory works in 2 ways - buy a complete, turnkey, high performance SpeedFactory Challenger from an authorized dealer, or SpeedFactory can take your existing vehicle and work our magic.

The SpeedFactory supercharged Dodge Challenger made headlines as the first high powered edition of the 2008 SRT8 models and has garnered favorable reviews from Hot Rod Magazine and Edmunds.com.

We know something about speed. SpeedFactory's R+D Charger (built from a 2006 Charger R/T) is the world's fastest 1/4 mile LX platform car.
(Click here to learn more).