The Profec B Spec II is an excellent quality duty cycle based boost controller. Easy to adjust with a built in boost gauge, Hi and LOW setting, and an over-boost warning point, warning limiter and peak/last boost recorder.

Profec B Spec II boost controllers from: $575 + install and set up.

Available for all models.

The HKS EVC-6 has improved boost stability for maintaining pressure at high RPMs providing increased top-end power and a new mapping feature allows boost pressure to be precisely tuned for throttle + RPM (or vehicle speed).

The EVC also offers a warning feature where if over boosting occurs, boost pressure can be programmed to drop to a user preset level.

HKS EVC-6 boost controllers from: $795 + install and set up.

Available for all models.

The EVC-S features a solenoid valve specifically designed to accurately control boost pressure up to 250kPa or 36 PSI, 2 boost level settings as well as settings for offset and boost response.

Also included are: overboost warning with drop boost feature; peak hold boost readings; after-image display; data lock and an internal diagnostic function.

HKS EVC-S boost controllers from: $495 + Install and set up.

Available for all models