HIREV Performance Manual Boost Controller — Ball & Spring Turbo Boost Controller, Universal Kit with Top Adjustment Knob

The HIREV PERFORMANCE Manual Boost Controller is a complete ball-and-spring kit that lets you precisely raise or lower turbo boost for internal or external wastegates.

Designed from hands-on turbo installs rather than theory, this adjustable boost controller gives consistent, repeatable control over boost pressure while minimizing boost creep common to simple bleed-style devices. The kit ships ready to install with a mounting bracket, hose, clamps and a top-mounted adjustment knob so you can tune boost quickly and reliably on the street or at the track.

How does this controller improve boost stability?

The ball-and-spring design creates a physical restriction in the boost reference line that stays consistent under load, providing steadier boost compared with many bleed controllers. The top adjustment knob lets you fine-tune spring preload so changes are incremental and repeatable.

• Ball-and-spring valve reduces sudden boost spikes and creep.
• Knob adjustment provides small, predictable boost steps.
• Bench-tested for airflow and consistent operation before shipping.

Will it fit my turbo setup—internal or external wastegate?

This kit is compatible with both internal and external wastegates and installs inline on the pressure reference hose; no specialty adapters are required. The included hose and clamps cover most common vacuum/boost line diameters used on street and sport turbo systems.

• Works with internal and external wastegate configurations.
• Inline installation—no cutting complex lines or special tools.
• Includes hose and clamps sized for typical turbo reference lines.

What comes in the box and how easy is installation?

The kit arrives complete: the manual boost controller assembly, a mounting bracket, boost hose and hose clamps. Installation is straightforward—mount the controller, cut the boost line, insert the controller inline, tighten clamps, then dial the knob to the desired boost level.

• Complete kit: controller, bracket, hose, clamps—ready to install.
• Simple inline install—can be done with basic hand tools.
• Factory inspection ensures no debris or blocked passages out of the box.

How precise are adjustments and what can I expect while tuning?

Adjustments are tactile and predictable: small turns of the top knob change spring preload and alter boost in consistent increments. Because the unit was bench-tested and validated on real turbo vehicles, you can expect repeatable results each drive session as long as boost control strategy and engine tuning are appropriate.

• Top-mounted knob for controlled, incremental boost changes.
• Repeatability across sessions thanks to mechanical ball-and-spring design.
• Recommended to monitor boost with a gauge and tune safely.

Who is this for? The HIREV PERFORMANCE Manual Boost Controller is aimed at enthusiasts and tuners who want a robust, street-ready way to adjust turbo boost without relying on complex electronics. It fits builders who run LS swaps, sport compact turbo projects, and daily-driven performance cars that need reliable, repeatable boost control. If you want a straightforward mechanical solution that ships complete and is pre-inspected, this kit provides a practical, proven option for manual boost management.