Will Henry and Brian McIntosh were discovered dead in the 4x4 at the back of industrial units near a disused railway line in Brierley Hill, Dudley, on September 30.
Detectives later separately arrested Jonathan Houseman and Richard Avery. Both were subsequently charged in connection with the shootings.
They appeared by video-link separately at Birmingham Crown Court yesterday to enter pleas.
Houseman, 32, pleaded not guilty to two counts of murder.
Avery, 33, who is alleged to have disposed of, or helped, Houseman get rid of “clothing or other items”, denied a charge of perverting the course of justice,
Avery was not asked to enter pleas to two counts of conspiracy to murder.
A further pre-trial hearing is set to take place on March 2 and both men were remanded back into custody until that date.
Houseman, formerly of Quarry Park Road, Stourbridge and Avery, of no fixed address, are due to stand trial at the crown court before a High Court judge on June 9.
The trial is expected to take up to four weeks.
Mr Henry, 31, and Mr McIntosh, 29, both of Bartley Green, Birmingham, were found at the scene off Moor Street in Brierley Hill at around 3.30pm.
Detectives believe both men were shot at around 1pm. Mr Henry was reportedly the brother of West End actor Matt Henry.