Map Sensor collector kitsUsed for engines with individual throttle bodies, these kits utilise equal length hoses, ensuring that each vacuum pulse arrives at the collector at the correctly timed intervals. The kits contain Stainless nipples to be fitted to each intake runner or throttle body at the exact same location distance from the throttle butterfly. Unlike a Vacuum Rail which contains a large air volume, the collector and small diameter vacuum hoses keeps the volume to a