This is our premium manual boost controller kit. Simple to use manual boost controller aka boost valve. Increases torque even at stock boost level by creating faster boost response so the turbo reaches max boost at a lower rpm.

Welcome to the most refined manual boost controller available on the market today. The Stage 3 Manual Boost Controller allows you to raise OEM boost levels in a quick and efficient manner through superior boost range and ultra-fine resolution (.25 PSI/click). Adding the MBC to your car will result in quicker spool up, quicker response and rock-solid boost control.

Design:
The first boost controller of its kind, This Stage 3 Manual Boost Controller uses Exact Control Technology, with over 250 adjustment points that lock into place via heavy duty stainless dual-ball detent system. An extra long travel spring gives you superior range, unmatched by any other manual boost controller on the market while maintaining high resolution, not just a vague guess at where to set your boost. Don't trust the life of your engine to trial and error, instead, pinpoint your boost setting using the adjustment scale running the length of the controller. CNC machined from 6061 Aluminum, anodized and laser etched, our MBC is designed to outlast your car. The Stage 3 Manual Boost Controller redefines precision control and will deliver the results that you demand.

Fitment:
Will work with any OEM or Aftermarket turbo application. 

Also included with the boost controller are the mounting bracket, mounting hardware, reducer fittings, and zip ties. 

Installation:
Simply install between your boost pressure source and your wastegate/wastegate actuator. The side port goes to the gate/actuator and the bottom port goes to the compressor outlet or other boost source. Then simply dial in your boost pressure by turning the adjustment knob (screwing knob in increases boost, screwing cap out lowers boost). Adjustable up to approximately 40psi with the supplied spring. 

Warning:
Increasing boost can be dangerous for your engine. Be sure you have sufficient supporting mods, fuel flow, etc. to support the higher boost pressure or engine damage will occur. We are not responsible for damages. 

Features:

• No Tools Needed for Adjustment
• Soft-Touch Screw in cap for more boost, screw out cap for less boost
• Laser Etched Cap for More/Less Boost
• Adjustable from wastegate spring pressure to approximately 40psi on most applications (heaviest spring installed).
• Black Anodized Precision CNC Machined - 6061-T6 Aluminum
• 6mm - 1/4 inch Barb Fittings
• Ball & Spring Design for Fast Response
• 3.4" Long, 1.4" Body Width
• 250 steps of adjustment - High-resolution control 0.25psi per click - 16 clicks per rotation
• Laser Etched Scale and Labels - Easy to read and repeat precise adjustments
• Universal Mounting Solution

Includes:

• Stage 3 Boost Controller
• Mounting Bracket
• 4ft of 4mm Silicone Hose
• Reducer Fittings (for adapting supplied hose to existing vehicle vacuum line)

Options:

• Upgrade to Thick Wall Silicone Hose for High Boost Applications

Hose Fitment:
6mm ID hose fits tight but certainly needs clamped on to prevent it from popping off in high boost applications. 4mm ID hose is tight/stretches over and would not need a clamp but it takes some work to get it on the barb fittings. So measure the port you plan to connect it to on the vacuum tree or turbo outlet and measure ports you may also connect to the same hose (like a boost controller) to determine which size you'd rather use so you don't have to adapt to different sizes. 

Installation:
Bottom port (opposite of adjuster knob) connects to a boost source (nipple on outlet port of turbo, or directly to vacuum tree). Side port goes to wastegate actuator (for external wastegate, use port closest to where the wastegate bolts to the header and leave the port on the end of the wastegate open to atmosphere, not capped).

Ideally the controller is mounted near the wastegate for best response time but away from vibration, while also being easy to access when the turbo is hot. We typically mount them to the inner fender/strut tower near the turbo.