Air/Fuel Pressure Regulator

[2000NavyAleroGLS]

I was looking at this air/fuel pressure regulator. The ARC2 A/F Ratio Calibrator. I was wondering if any of you have one. Would you recommend getting this at all. If any of you have it how much of a difference does it make power wise from stock setup. Here it is if you want to take a look. Air Fuel Regulater (http://www.pfyc.com/store/merchant.mv?Screen=PROD&Store_Code=PFYC&Product_Code=GN3008&Product_Count=10&Category_Code=ALUNDER)

[Fast Eddie]

Its not gonna gain you anything in terms of horsepower on a stock engine and not much on a modified engine. Its more to tune the engine and make sure it runs with heavy mods.