This is a stock replacement PCV valve a 5.7L HEMI powered Dodge and Chrysler.  

Constructed from strong, high-quality materials. Gates OE Exact fit Crankcase Ventilation Pressure Regulators, PCV Valves ensure an exact fit and easy installation while effectively restoring the emission ventilation system to desired operation and performance levels.

• Direct fit replacement ensures exact fit and easy installation.
• High quality materials are resistant to oil and heat.
• Prevents oil and vapor leaks.

A gunked up PCV valve can cause a vacuum leak between your engine's crank case and intake manifold. This is difficult to spot on a 5.7L HEMI engine due to the integrated crank case venting system. 

Fits the following vehicles:

• 2005 - Current: Dodge Charger/ Challenger 5.7
• 2005 - Current: Chrysler 300 5.7
• 2007 - Current: RAM 1500 5.7 (note: early 2007 vehicles might have have a gen III engine)
• 2007 - Current: Jeep Grand Cherokee V8 (note: early 2007 vehicles might have have a gen III engine) 5.7, SRT 
• 2007 - Current: Dodge Durango V8 (note: early 2007 vehicles might have have a gen III engine) 5.7, SRT
• And many more V8 Hemi vehicles.