GrimmSpeed 03-06 Evo 8/9 Boost Control Solenoid

$110.00
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The Most COMPLETE EVO BCS Ever Built, Period.

GrimmSpeed Mitsubishi EVO 8,9,10 3-Port Electronic Boost Control Solenoid
  • Get into Boost Much Quicker
    (Flows 10% more than the competition)

  • Plug and Play into OEM Harness
    (no splicing wire like other BCS!)

  • Factory Fit with clean install

  • Works Safely with Factory EVO ECU
    (custom coil to match ECU)

  • Nickel Plated Fittings as this is Built To Last
    (not the easily breakable plastic fittings!)

  • Easy to Install and Very Easy to Tune

  • The Only Direct Bolt-IN BCS for EVO


The GrimmSpeed™ Mitsubishi EVO Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will not reduce the life of your factory computer because it is designed to draw the same ammount of power as the factory BCS but flows better and reacts faster. It plugs in and requires no splicing or soldering of resistors. With the included bracket you can bolt it in, plug in the connector, and start tuning for fast boost response, increased boost pressure and free up lots of power. Planning on returning the car to stock? Just reverse installation.

Why run an Electronic BCS over a Manual Boost Controller?
A MBC allows you to run higher than stock boost levels by preventing the wastegate from opening at its rated pressure. It does a great job at this but if boost is available under the MBC setting it will give you that full boost. So for instance, you set your MBC to 18psi because from 3000-6000rpm thats what you want. But then say you get detonation with 18psi when you are at 7000rpm unless you are below 16psi. With a MBC, you do not have this control so you are forced to run 16psi through the entire rev range. With an electronic boost controller you could run 18psi from 3000-6000 and 16psi at 7000rpm because you can tune the boost map in the ECU which will allow you to run the maximum amount of boost at every given rpm. This gives you more power throughout the range and better control. Revolutionizing the EVO boost solenoid market, we have created model specific install brackets that allow you to directly fit our Boost Solenoid into your EVO for a factory fit. No more Zip-tying! We give you the factory fitment you have been waiting for.

Staying with the OEM fitment theme, our Boost Solenoid uses a EVO style wiring harness so you can simply unplug your OEM solenoid and plug ours in. No more cutting the oem wiring and crimping wires together!

Also new to the EVO boost solenoid market, we have used ultra low-profile hose fittings to keep the unit as small and clean as possible. The hose fittings are nickel plated brass so you don't have to worry about them snapping off like the plastic hose fittings!

More Features:

  • Users can use AN fittings with the solenoid.
  • MAC Valve has completely custom made the valve for us(only MAC valve on the market to be custom made for automotive tuning use).
  • Specifically designed by GrimmSpeed™ to work safely with the factory EVO ECU (requires tuning) and to reliably handle the vibrations and temperatures of your engine bay!
  • The only direct “bolt in” design for the EVO. Direct bolt in mounting bracket and hardware included! (specify which model before ordering)
  • Faster response and greater flow than any other valve out there. (by more than 10%!)
  • Nickel plated brass fittings. (unlike the competitors failure prone plastic fittings)




Easy for your shop or tuner to tune! (Engine tune is required!)

What is the GrimmSpeed Lifetime Warranty Policy? GrimmSpeed branded products are warranted to the original owner against manufacturing defects in materials and workmanship for the lifetime of the product. If a GrimmSpeed branded product covered by this warranty fails due to a manufacturing defect we will repair the product, without charge, or replace it, at our discretion. Only original, unaltered and unmodified materials and workmanship are covered by this policy. This warranty does not cover damage caused by accident, improper care, negligence, normal wear and tear, or the natural breakdown of colors and materials over extended time and use. Damage not covered under warranty may be repaired for a reasonable rate and a fee will be charged for return shipping. For warranty evaluation, your product must be returned directly to GrimmSpeed Warranty Department, 650 Taft St NE, Suite 300, Minneapolis, MN, 55413. All shipping to Warranty must be pre-paid and insured. GrimmSpeed cannot be liable for lost in-bound packages. This warranty is available in the United States and Canada. This warranty gives you specific legal rights; you may have other rights, which vary from state to state. This warranty does not cover products sold by GrimmSpeed that are not GrimmSpeed branded products. The GrimmSpeed website sells GrimmSpeed branded discontinued, special make-up, and slightly blemished products at significant discounts as 'factory seconds' products. This warranty does not necessarily cover any products purchased as 'factory seconds'. The GrimmSpeed Warranty Department may repair 'factory seconds' products for a reasonable charge and a fee will be charged for return shipping. Is normal wear and tear Covered? The GrimmSpeed lifetime warranty covers manufacturing defects in materials and workmanship, regardless of the age of the product, but it does not cover normal wear and tear. Wear and tear is damage that naturally and inevitably occurs as a result of normal use. Regardless of how carefully you use, or how well you care for your GrimmSpeed product, it will eventually begin to show age and wear. Common examples of wear and tear that would not be covered under the lifetime warranty include abrasions or scratches, color changing from heat in exhaust components and so on. How do I send my product in for warranty? The first step is to contact support@grimmspeed.com and let them know of your issues/concerns. From there, a customer service representative will work with you to determine the best path forward. For the quickest service, please include photos of the failed product along with a copy of your receipt/invoice in your initial email.