From the Wiki (well, mine that is)
Exterior¶
The Ram SRT-10 had a unique hood that featured a wide power bulge and hood scoop, this design was improved upon by
JTS Venom Performance, to include a larger buldge, with ACR style venting. The hood scoop allowed cool air to enter as well as forcing hot air to exit from the engine bay, thus helping the engine to run cooler. "Viper Powered" badges were added to the sides of the power bulge, to indicate the SRT-10 engine under the hood. Another exterior feature was a
tonneau cover with an attached spoiler that was supposed to come standard on the 2005 Quad Cab version and all 2006 models, but due to manufacturing problems was not installed on nearly half of the Ram SRT-10s intended. To help remedy this situation, Dodge added a $1000 credit and a regular spoiler to the Ram SRT-10s that did not receive the
tonneau cover. In addition to style, the spoiler also helped with air flow and provided a reduction in lift and drag. The Ram SRT-10 had a bed size of 6.5 feet (2 m), giving the regular cab an overall length of 17 ft 7 in (5.36 m), and 19 ft 2 in (5.84 m) overall length for the Quad Cab. The Ram SRT-10 also had a lower ride height than regular Ram trucks.
Last I heard is that all 2006's were to have the tonneau (except) for ones that were pre-ordered and the buyer did not want it, or removed at the dealership.
However...
Like almost everything else with the RAM SRT-10, dodge forgot to keep notes