Welcome to the most refined manual boost controller available on the market today. During development, we worked hand in hand with tuners across the country to develop this device and ensure that it solves legitimate problems that they have with other existing boost controllers. The GrimmSpeed MBC allows you to raise OEM boost levels in a quick and efficient manner through superior boost range and ultra-fine resolution (.25 PSI/click). Adding the MBC to your car will result in quicker spool up, quicker response and rock-solid boost control.
250 steps of adjustment - High-resolution control
16 clicks per revolution - Facilitates exact adjustment
Laser Etched Scale and Labels - Aasy to read and repeat precise adjustments
Superior Range without Sacrificing Resolution - 0-60 PSI capability with ultra-fine adjustments
Universal Mounting Solution - Can be rotated for multiple mounting positions
Precision CNC Machined - 6061-T6 Aluminum
The first boost controller of its kind, The GrimmSpeed Manual Boost Controller uses Exact Control Technology, with over 250 adjustment points that lock into place via heavy duty stainless dual-ball detent system. An extra long travel spring gives you superior range, unmatched by any other manual boost controller on the market while maintaining high resolution, not just a vague guess at where to set your boost. Don't trust the life of your engine to trial and error, instead, pinpoint your boost setting using the adjustment scale running the length of the controller. CNC machined from 6061 Aluminum, anodized and laser etched, our MBC is designed to outlast your car. The GrimmSpeed Manual Boost Controller redefines precision control and will deliver the results that you demand.
Will work with any OEM or Aftermarket turbo application.
Woke my 7.3 right up. Vary easy to install. And it matches the paint on the truck.
Crystal creek proformance20th Sep 2017
Looks great in engine bay. Easy to hook up and adjust will be ordering more for other cars I work on!
matt30th Aug 2017
Ive officially now owned 2 of these. one on a high (30+psi) application and one now on a lower ~10psi application.
Boost control is accurate regardless of pressure. Consistent too.
Solid design, not cheap or flimsy or weak. Even on "0" it delays the gate slightly and helps spool on my current vehicle.
Anyone looking for an MBC I point to this product.
Chuck11th Jul 2017
Must have with turbo
Ordered this one for a spare my other locked up when I called they said send it back for a replacement, long story short just a little fogging oil and the next day it worked perfect. This is on a jet ski in Florida so maybe the salt air after a couple of years without turning it so now I have two. Customer service second to none with a great product.
Dave D24th May 2016
This MBC replaced one I made from the plumbing & hardware departments of mu Local Ace Hardware. It worked but would not hold the full boost. I have an Apexi AVC-R but decided to with the Grimmspeed MBC because of the complexity of the AVC-R I decided to go with the Grimmspeed. Glad I did - easy to install, predictable adjustment, holds adjusted boost level, no electrical hookups required.
Levi12th May 2016
Simple MBC to tame a beast
Had to purchase this for an emergency install, First point is that GrimmSpeed was able to get it to me the next morning/overnight which was awesome.
Install done on a 2013 Veloster Turbo.
The purpose of my purchase was to get a tune under control and I needed an MBC rated for at least 25lbs. While we worked on the maps we were hitting limp mode from overboost conditions so this was used as a safety measure now, and then for a better controlled tune later. Install was simple, not rocket science at all and the video they provide is already all you need. There isnt a lot to say other than this was a simple solution with an easy install, and easy to adjust. While they do emphasize the 'clicks' I have trouble both hearing and feeling them, but they are there. I have tested a range of 19.5Lbs to 23.5Lbs and monitored with the TORQUE app, each click is roughly 1/4 of a lb of boost. The MBC feels solid, device is annodized, not painted which is nice. Personally, I wish there was less grafitti on the top.
Total install, adjustment, and testing time was about 1 hour.
Justin26th Apr 2016
Outstanding product. Takes seconds to install. And minutes to tune to the precise psi needed. No boost creep or spikes. I recommend this product to all buyers. Thank you grimmspeed!
Loy Maranon20th Apr 2016
It works perfect!!
With a new and bigger turbo upgrade for my 7m-gte....Grimm Speed MBC is just right to handle that big boost...running at 12-15 psi
John Reynolds10th Mar 2016
Just as advertised
Works just as advertised. Had a TurboXS manual boost controller before and was not half of what the GrimmSpeed boost controller is. When I had the TurboXS boost controller, it was so Inconsistent that I just went back to adjusting my boost by the spring. With this GrimmSpeed boost controller you have great adjustablilty, plus the boost comes on stronger and faster then just running a spring. Great product, one turbo cars have needed for years. Thanks GrimmSpeed
Thomas25th Jan 2016
I was running no controller only the wastegate spring. This forced the boost to come on earlier and harder. Great little product.
17th Jan 2016
Simple wiht good quality
The Grimmspeed manual boost controller are made with good quality. The supplied bracket made installation a breeze. It even comes with a piece of hose witch came handy under the instalation.
brodan21st Dec 2015
Grimmspeed Manual Boost Controller
Works flawlessly and it's super easy to set up!
Eugene of LAS VEGAS27th Nov 2015
I don't like it I LOVE IT!
Product is simple to adjust and with the ball bearings in there you can really feel the adjustments you're making. Besides the ease for adjusting it looks great!
Sean5th Nov 2015
Great price, significant gains, highly suggested
The price is fantastic. The quality seems good. I had no problems with installation. I'm now pushing 5.25 more PSI! Wohoo!
Radi4th Jun 2015
Awesome product. Works great. Easy to set up and adjust. Stays consistent.
Araz5th May 2015
I bought and adjusted the mbc.Its design and quick acting performance make it unique in the mbc industry. The scales on it also differs this mbc from others. It is very east to install and use.
Josh M.23rd Mar 2015
Manual Boost Controller
I bought the Grimmspeed manual boost controller. I really liked the features of adjustability on this manual boost controller overt the others I looked at. So far so good been holding pressure real nice. I am using it for my low boost Honda Build. Holds 10psi just fine no spikes.
20th Mar 2015
I like it
The controller is a very nice design , easy to use , and install , I use it on my Buick Grand National ,
Ryan28th Jan 2015
I've ran the 3 port from you guys for several years with no issues. After hearing the opinion of others with manual controllers and seeing the half price factory 2nds, I just had to try one out.
This makes it so easy to adjust boost. Never spikes, and hits my targets immediately. As much as i liked the 3 port I like the immediate response from this one even better on my Daily Driven 450whp Forester.
Sam in Texas5th Jan 2015
Exactly as Advertised
Great quality product! Set it and forget it with this one. The scale helps with setting your ideal boost and very easy to manipulate if you're playing with the boost level.
Jon7th Oct 2014
Does exactly what it's told
It is a spring to reduce the air pressure that either the boost control solenoid or the wastegate sees. It works precisely in that manner, as my BCS in my '02 WRX had stopped working so this being cheap I threw it in with it performing as it should. No complaints here!
Zach Ryan15th Jan 2013
"I'm planning on running a hybrid boost control on my 2003 WRX with the Grimmspeed 3-port, and purchased this MBC for the project. I've had nothing but good experiences with the 3-port EBCS, and so it seems this MBC is of equal quality. I ran the MBC by itself to test the device and the boost control is fantastic! The MBC adjustments are nearly exactly what GS claims: 4 PSI per rotation. I'm looking forward to the performance when running the GS EBCS and MBC in conjunction. The unit comes with all the hardware fittings which is great.
The only suggestion I have for Grimmspeed is to add an in-cabin adjustment capability like the Hallman RX Pro. However, for quality, adjustment, and price, the GS unit is clearly superior. Great product yet again."
Stephen Johns15th Jan 2013
Hands down the best boost controller i have ever used! Highly recommended!