OKAY.....$70 to replace the "overboost sensor" A few questions on this item. The car seems to run fine without it. What will I gain by replacing this item? I plan on installing a manual boost controller in the future. WHen I install the boost controller will it be in vain if this sensor is working?

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R