ISR OE Replacement Z32 Mass Air Flow Sensor
These are a Must when doing a turbo upgrade on the SR20DET or KA24DE 
This is not something you can just bolt onto a stock 240, this is an upgraded MAF designed to be used with a turbo setup, larger injectors, larger turbo, etc. Some sort of Engine management will be needed to control the MAF. Ie. Romtune, AFC, or full EMS engine management. 
ISIS is the first to bring these OE Replacement parts to the US. This would be just like getting a new MAF From the local autoparts store, however they no longer sell them, or require a core. Replaces OEM Nissan part # - 22680-30P00
These are BRAND NEW!!! These are not refurbished, These are new!!
Dont spend $600 for a new NISSAN one. 
Dont forget a MAF Plug, choose from the Options drop down box while ordering.