Gino's right, every 160th L and K Blackhawk does have the inlet covers.
I found some pics of a MH-60A, MH-60L and a MH-60K to illustrate the differences.
MH-60A:
This was the first blackhawk type to enter service with Task Force 158 in 1980. The Blackhawks were initially modified from UH-60As (acquisitioned from the 158th Aviation Battalion of the 101st Air Assualt Division) by changing the cockpit to be compatible with night-vision devices. Later changes included a Forward Looking Infared (FLIR) sensor under the nose, the Hover Infared Suppression Subsystem (HIRSS), and various other avionics upgrades. To my knowledge, the "Nightstalkers" no longer use the MH-60A Velcro Hawk (named by the adhoc way the modifications were made to existing airframes).
MH-60L:
1989 brought the MH-60L into the 160th SOAR's inventory. The Lima model features a color weather radar mounted in the large radome on the nose, up-rated T700-GE-701C engines, an In-Flight Refueling (IFR) boom (though not all MH-60Ls have this capablity), an extensive communications suite including satellite radios, and a revamped cockpit with Multi-Function Displays (MFDs) to show FLIR and radar data. The MH-60L is still in use with the regiment and is most famous for Operation Gothic Serpeant, the Mogadishu shoot-down of two Blackhawks on 3 Oct 1993.
MH-60K:
The most advanced type , the MH-60K, first entered service in 1994. The digital cockpit of the Kilo is a complete reversal of normal Army Helicopters. In fact, it takes a new pilot two YEARS to become fully mission-qualified in a company compared to three MONTHS for a new pilot to become fully mission-qualified in the MH-60L. The easiest way to identify a Kilo is by the smaller nose radome of the Terrain-Following/Terrain-Aviodance radar. The SATCOM blisters just aft of the HIRSS are another give away that the Blackhawk is a MH-60K.
MH-60A/L Direct Action Penetrators:
A quick word on the DAPs. There is no dedicated AH-60 DAP, they are all multi-mission aircraft. The MH-60A was first modified to the DAP standard, basically just rewiring the aircraft to fire the miniguns. Later, a few MH-60Ls were out fitted with DAP controls. However, NO MH-60Ks have the modification. They are only fitted with the crew manned miniguns. The idea behind the Direct Action Penetrator was Cliff "Elvis" Wolcott, the pilot of Super Six One, the first blackhawk shot down over Mogadishu. Tragically, Cliff was killed as a result of the crash.