I have a DL-32. It's just the main box, no SD card or 2.5mm headphone jack cable. Pretty easy to install all it needs is power/ground and then you run your other stuff too it.
32 channels of data recording
5 internal channels
17 Minutes of recording per MB of SD card capacity
1-bar to 3-bar pressure sensor (MAP, Vacuum, Boost, etc.)
Thermocouple amplifier (EGT, CHT)
Duty cycle (dwell) or frequency
2-axis accelerometer (acceleration Gs, braking Gs, and cornering Gs)
5V power supply for external sensors
Expansion ports for future upgradeability
New they are $500 bones, I'll let this go for $300.