Company23 Anti-Surge Boost Control Solenoid Subaru WRX 2015-2021

Rated 5.0 out of 5
Based on 1 review
Boost Control Solenoids

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Part #: COP-525

This is Company23’s new innovative Anti-Surge Boost Control Solenoid. Here is an essential part that will eliminate that common internal and external wastegate flutter providing the driver with a consistent, yet a very strong boost curve. This is game changing boost control technology for the turbocharged flat four platform, which utilizes patent pending electronic anti-surge technology.

How does it compare with other 3-port boost control solenoids? The main feature is that it eliminates wastegate flutter. It prevents oscillation in the boost curve, and it makes more horsepower and torque when compared to a detuned map that is focused on eliminating flutter.

When compared to manual style boost controllers, the Company 23 Anti-Surge unit will allow RPM/load dependent boost control. You won’t have to worry about partial throttle/full boost during closed loop. And it does not require retuning for temperature or seasonal changes, or even changes in elevation.

*New* v2 model Features:

  • We revised the valve housing and solenoid valve to enhance the dynamic range. We've also changed the calibration to make it significantly easier to tune by matching the boost curve range of our standard boost controller.

Other features include:

• Tuners can create precise boost curves that increase sppol and horsepower, by not detuning your vehicle to eliminate boost oscillation..
• Works great on cars ranging from stage 2, and upwards of 800 HP.
• Very tuner friendly. This solenoid can be as simple to tune as your traditional 3-port solenoid.
• Installation is simple with OEM style mounting brackets and electrical connectors. This is a plug in, and start tuning device.
• Crafted from CNC machined and anodized 6061 aluminum housing, and it is completely sealed for long-lasting use.
• The boost controller is a custom 3-port solenoid designed by Company23, and manufactured by MAC.
• 6mm (1/4”) CNC machined hose fittings.

In conclusion if you’re looking for that boost control solenoid that works well with your modifications, and will provide strong boost control, then this is the unit for you. There’s no need to opt for a standalone boost control system. This is an easy plug and play unit that will deliver more performance that is less complex, and cost effective. Works well with factory or aftermarket style turbochargers.


Any returns for an exchange or refund will be allowed within 30 days from the receipt of your order and must be authorized prior to shipping with an RMA Number (Return Merchandise Authorization). To receive your return instructions and RMA# please use our online form under Returns and Exchanges! Once you receive your return instructions please ship out the item at your earliest convenience and provide the tracking number to your customer service rep. The customer will be responsible for all shipping fees. Before shipping your product back please make sure you package it up exactly how you received it and in all of its original packaging. All items must be in brand new and resalable condition. Once the item is received it will be inspected and a credit will be issued accordingly. All returns are subject to a 15% restocking fee. Any returns received without an RMA# will be charged a restocking fee and any shipping fees associated with the return. An item that does not ship directly from IIR's warehouse is considered a "special order" item and no returns will be authorized.

average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Kyler S.
I recommend this product
Rated 5 out of 5
Review posted

Good luck finding one!

These bad boys were discontinued because of Covid, but thank god I bought one early and just held on to it. I haven’t seen a single FA using this setup on the internet, but I can assure you it’s worth it. That shuttering noise under boost that the Grimmspeed EBCS makes gets really annoying after a while, and this makes the boost rock solid. Just makes it sound different than most other stereotypical FA setups.

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Company23 Anti-Surge Boost Control Solenoid Subaru WRX 2015-2021
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