Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Air and Fuel› Superchargers, Turbochargers and Components
Go Fast Bits
GFB G-Force 4-Port Solenoid (Includes 4 Hosetails)
SKU: G004 3845
Easy — 1–2 hours
Overview
Show original supplier description
Part #: 3845
If you're wanting to hold your wastegate shut longer, or wanting to extend the operating pressure range of your current wastegate spring setup, then a 4 port boost control solenoid will help you get there. A 4 port solenoid is also a better option for those who are running antilag in their vehicles. For the most part though, a 3 port is more than sufficient.
For extension of operating range of wastegate set ups.
Vehicle Symptoms
- Boost pressure spikes under heavy acceleration
- Engine enters limp mode on hard throttle
- Inconsistent boost levels during WOT pulls
- Wastegate fails to hold boost target
- Check engine light with overboost/boost control codes
Diagnostic Codes
- P0234 – Engine Overboost Condition
- P0243 – Turbocharger Wastegate Solenoid A Malfunction
- P0244 – Turbocharger Wastegate Solenoid A Range/Performance
Relevant Conversations
- GFB 4 port boost control solenoid vs 3 port differences
- how to install GFB boost solenoid on WRX
- P0234 overboost fix after turbo upgrade
- wastegate solenoid upgrade for higher boost
- GFB D-Force electronic boost controller solenoid
- boost spikes after remap need new solenoid
- P0243 code replacement part for wastegate
- 4 port boost solenoid for antilag setup
- GFB 3845 boost solenoid review and install
- best boost control solenoid for high boost street car
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Go Fast Bits |
| Part Number | G004 3845 |
Videos
![Boost Control Explained [GO FAST BRETT]](https://img.youtube.com/vi/3SrAxPhW_Es/hqdefault.jpg)
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy