BD Diesel Variable Vane Exhaust Brake for 2004.5+ Duramax 130 HP Retarding Force

BD Diesel Variable Vane Exhaust Brake for 2004.5+ Duramax — 130 HP Retarding Force Maximize control on descents and while towing. The BD Diesel Variable Vane Brake (VVB) leverages the factory variable vane turbo design in 2004.5+ Duramax engines to create up to 130 horsepower of retarding force by electronically closing the turbo vanes and increasing exhaust back pressure. Key Benefits Superior vehicle control: Maintain speed on steep grades and tight curves for safer towing and hauling. Integrated transmission management: Includes automatic, moderate and aggressive Allison downshift programs for optimized weight control; works with manual Allison selections too. Cruise control integration: Automatically accelerates and decelerates to hold set speed using exhaust braking. Simple installation: Plugs into factory ports and mounts a compact dash rotary switch — no complex plumbing or multiple components required. Cost-effective: Single-package solution replaces multiple aftermarket parts and reduces install time. How It Works When engaged (Tow/Haul mode recommended), the VVB closes the turbo vanes any time you release the throttle, producing exhaust back pressure that resists piston travel and slows the vehicle without excessive wear on wheel brakes. Package Includes VVB control module Dash-mounted rotary switch with three modes Factory-compatible wiring harness for plug-and-play installation Perfect for Duramax owners who tow or frequently drive mountainous routes — the BD Diesel VVB adds engineered, reliable engine retarding to improve safety, control, and confidence on the road.