VNT Boost Controller Includes:1x VNT Boost Controller Details:- The High Performance Diesel VNT Boost Controllers have been designed and created to suit Nissan Patrol ZD30 CR's and DI's, as well as all vehicles with vacuum actuated turbo's.- These Boost Controllers are made here in Australia with the quality and performance we have come to know from the HPD brand.- These Boost Controllers allow users to adjust turbo boost and therefore increase engine power, reduce turbo lag and create a linear boost curve. By also reducing boost spikes, the risk of 'over-boosting is minimized, which can be harmful to the turbo's internals.- HPD Boost Controllers are perfect for those seeking greater control over engine management, are the perfect complement for those with HPD Intercoolers and Catch Cans.