Anytime you want to run more than 33psi of boost then you must upgrade the MAP sensor.  This upgrade is ideal for those with built motor setups and large turbos looking to achieve 700whp+.  
 
Here are the details:
Good for temperatures as low as -40°F to 260°F
Going from 10% of the pressure scale to 90% takes .001 seconds
Direct replacement for your stock MAP sensor
Plugs into the stock harness
TUNING REQUIRED