GRIMM vs KR Off Road ARB Mount

Mikey D

Nov 12, 2022

Definitely would love to get rid of my old carry-on compressor and go to on-board. I'm looking at either a single or dual ARB Compressor and bowling it down to GRIMM or KR mounts.

Anyone have any opinions on mounting either vertically or horizontally? I plan on wiring to AUX switches.

GRIMM PROS/CONS:

+Vertical mount seems to provide more head space with hood.
+Easier access to the PCM module in case you have to remove or work on it.
+Wiring harness is easy (but that's only if you plan on using provided switch connection, not AUX switches). If not, you still have to wire to AUX.
- Only works with Twin and not singular compressor.

KR OFF ROAD PROS/CONS:

+ (-) Mounts horizontally (not sure it matters), although I saw a few posts on problems with the filter cap hitting hood. I'm thinking they didn't adjust angle enough.
+ (-) Don't need to move PCM module but may be more difficult to access later.
+Works with both Twin and Singular compressor. This is a plus since I'm leaning towards a Singular and not Twin ARB Compressor.
(-) Wiring harness not as easy as GRIMM but still have to wire to AUX switches.

Price and quality about the same.

Any tips on either one is appreciated.

2022 | Outer Banks | 2 Dr | Race Red | 2.7L | Mid-Package

Laura

Last edited by a moderator: Nov 12, 2022

Sort by date

Reaction Score

Nov 13, 2022

I had the Grimm off-road kit for my Jeep and it was a quality kit. I was looking at the KR off road mount at first but after seeing Grimm has their setup I’m going that route. They have a better setup with it vertical from what I see and their switch bracket setup gives better options if someone doesn’t have aux switches or does but still wants to just run under the hood for the control. After using my under hood switch setup with the Jeep I can say it’s handy when airing up. It makes it easy to toggle off to check air pressure as I run my 4 line setup airing all four tires at once.

Mikey D

Nov 13, 2022

I installed the KR on mine - with an ARB twin - I adjusted the manifold to change the angle of the outlet - no problems. super easy to wire up to the aux switch. Used it this weekend and last, and filled the 35" Sasquatch tires up from 16psi to 35 in a total of 7 minutes using a 4-way Morrflate system.

Reservation: 7/20/20 | MY '21 order: 2/1/21 | MY '22 order: 10/22/21 | Blend 8/5, built 8/8, 'built' status 8/27, in my driveway 10/12/22
Auto Photographer in Sacramento CA:
www.instagram.com/photographybymarkbrooks

Adrenalin, the poacher

Nov 13, 2022

Maybe I'll reconsider Twin vs. Single. Don't do much off roading in FL, hopefully some tame trail riding so aren't too concerned with airing down. I'm putting tire delete kit on so I think the single will provide the security needed for any issues, and for now, I only have 33's.

2022 | Outer Banks | 2 Dr | Race Red | 2.7L | Mid-Package

Nov 13, 2022

I run a KR… bracket along with the optional KR switch holder bracket… I rerouted my outlet per their (KR) switch bracket…. Very happy… I little trouble reading the cooling level …but not an issue.

Completely created my own harness via ARB harness that came with the pump….
Pump power is hooked directly to the battery via fuses but the signal switch that enables the main switch is powered via the AUX switch… I enable the pump switch this way in order to make sure the truck is running before switching on the the pump….

Very happy with this set up!!!

Jungleboy, ResidualGenius

Nov 13, 2022

Slight side question that hopefully won’t hijack the thread. Is the cost of an ARB compressor worth it for occasional use? I definitely like the idea of onboard air vs taking up limited cargo space but have trouble convincing myself that the cost of the pump is worth it.

22 Black Diamond 2dr non sas w tow and roof rails.

Nov 13, 2022

dover157
Slight side question that hopefully won’t hijack the thread. Is the cost of an ARB compressor worth it for occasional use? I definitely like the idea of onboard air vs taking up limited cargo space but have trouble convincing myself that the cost of the pump is worth it.

If you go off road… even a modest trail… for comforts sake you really need to air down…
What makes this situation nice is how fast they can pump your tires back up to street pressure…(literally minutes)
In addition, after a night of sitting (cold pressure) the pressures usually need readjusting the next day (to get them even)…
To have this air source is really nice…

Is the ARB twin worth the expensive price…????
Probably not…. But it might be a luxury you would want to consider if you want to go off road on a regular basis.

If you have the room many people are more than happy with a CO2 tank…
Cheaper and very quick air up …
But for me I couldn’t sacrifice the space.

Hope this helps.

Mal, Calgecko

Nov 13, 2022

dover157
Slight side question that hopefully won’t hijack the thread. Is the cost of an ARB compressor worth it for occasional use? I definitely like the idea of onboard air vs taking up limited cargo space but have trouble convincing myself that the cost of the pump is worth it.

Subjective question. Depends on your POV. For me, although I probably won't use it for serious off-roading, I will use it enough to justify. Plus, these types of modifications let me have some fun and learn new sh*t. I have a 2DR and the cargo space is crazy small, so in that regard it definitely is worth it.

2022 | Outer Banks | 2 Dr | Race Red | 2.7L | Mid-Package

Adrenalin, dover157

Nov 13, 2022

Mikey D
Subjective question. Depends on your POV. For me, although I probably won't use it for serious off-roading, I will use it enough to justify. Plus, these types of modifications let me have some fun and learn new sh*t. I have a 2DR and the cargo space is crazy small, so in that regard it definitely is worth it.

I also have a 2dr and that space is at a premium. That’s the main reason I ordered the roof rails, nice to have the extra space option if needed. I’m pretty much a complete noob at properly off roading and want to make sure I’m heading in the right direction. Thanks.

22 Black Diamond 2dr non sas w tow and roof rails.

Mikey D

Nov 13, 2022

dover157
I also have a 2dr and that space is at a premium. That’s the main reason I ordered the roof rails, nice to have the extra space option if needed. I’m pretty much a complete noob at properly off roading and want to make sure I’m heading in the right direction. Thanks.

I'm a total newbie at this whole gig, so you're a step ahead of me. But hey, that's the fun in this whole deal. Learn, connect and even make a few mistakes along the way.

2022 | Outer Banks | 2 Dr | Race Red | 2.7L | Mid-Package

dover157

Nov 13, 2022

#10

Mikey D
Definitely would love to get rid of my old carry-on compressor and go to on-board. I'm looking at either a single or dual ARB Compressor and bowling it down to GRIMM or KR mounts.

Anyone have any opinions on mounting either vertically or horizontally? I plan on wiring to AUX switches.

GRIMM PROS/CONS:

+Vertical mount seems to provide more head space with hood.
+Easier access to the PCM module in case you have to remove or work on it.
+Wiring harness is easy (but that's only if you plan on using provided switch connection, not AUX switches). If not, you still have to wire to AUX.
- Only works with Twin and not singular compressor.

KR OFF ROAD PROS/CONS:

+ (-) Mounts horizontally (not sure it matters), although I saw a few posts on problems with the filter cap hitting hood. I'm thinking they didn't adjust angle enough.
+ (-) Don't need to move PCM module but may be more difficult to access later.
+Works with both Twin and Singular compressor. This is a plus since I'm leaning towards a Singular and not Twin ARB Compressor.
(-) Wiring harness not as easy as GRIMM but still have to wire to AUX switches.

Price and quality about the same.

Any tips on either one is appreciated.

Install on the Grimm was not to bad. Everything gets pretty tight space wise . I’m happy with it. Trail recon has a great YouTube video on the install as well .

Attachments

image.jpg 4032 x 3024 · 1.69 MB

image.jpg 4032 x 3024 · 1.55 MB

Jungleboy, Calbaugh

Nov 13, 2022

#11

Grimm looks like the winner to my eyes. Do these ARB compressors get heat soak from the engines at all?

L.R.

Deano Bronc

Nov 13, 2022

#12

I like the Grimm kit and install method better... but I don't really need the dual ARB compressor. I'd be perfectly fine with the single ARB. The KR kit supports both the dual ARB and the single... pretty sure the Grimm only supports the dual.

I'll probably end up with the dual ARB in the end, but waiting around for holiday sales to see what options present themselves.

2022 4dr Badlands, 2.3L Manual, Mid pkg
YouTube: youtube.com/@ragnarkon
Instagram: @ragnar.kon

Mal, Deano Bronc

Nov 13, 2022

#13

Buy once cry once! We purchased the dual before our 6 week trip (see @RedCrackerOutdoors on IG) It was completly worth the cost! 600 bucks aint cheap, but in the real world any more its not expensive either.

L.R.

Adrenalin, Mal

Nov 14, 2022

#14

FWIW, I had a little trouble with the customer service from KR. As a result I will be purchasing the Grimm kit myself, and will be avoiding 4x4LEDs in the future as well.

Mikey D, Calgecko

Nov 14, 2022

#15

Function_7
FWIW, I had a little trouble with the customer service from KR. As a result I will be purchasing the Grimm kit myself, and will be avoiding 4x4LEDs in the future as well.

Interesting, I've had nothing but great experiences with 4x4LED's

Function_7, Deano Bronc

Nov 14, 2022

#16

Calgecko
Interesting, I've had nothing but great experiences with 4x4LED's

Yup, most people seem to have great experiences, that's why I was surprised.

Just my experience, and my thoughts, so take them for what they're worth. As stated, I'll spend my money elsewhere

Nov 16, 2022

#17

Sdge
Install on the Grimm was not to bad. Everything gets pretty tight space wise . I’m happy with it. Trail recon has a great YouTube video on the install as well .

The original PCM mount has a hole at the bottom to hold the plastic screw that attaches to the wheel well material.
With the GRIMM kit, it looks like you completely remove the original PCM mount. Does the GRIMM kit provide another hole for that plastic screw?

LoneRanger

Nov 16, 2022

#18

BaBump
The original PCM mount has a hole at the bottom to hold the plastic screw that attaches to the wheel well material.
With the GRIMM kit, it looks like you completely remove the original PCM mount. Does the GRIMM kit provide another hole for that plastic screw?

Check out the Trail Recon vid. I believe he just re-attached the wheel well screw back into its original position thru mount. Didn't see him drill out new hole. Good question.

2022 | Outer Banks | 2 Dr | Race Red | 2.7L | Mid-Package

Nov 16, 2022

#19

Watching it again now (I like this guy by the way. He reminds me of the Mister Rogers of the garage--knowledgeable and positive.)

Yea, I don't see the reconnection of that wheel well screw. And looking at the bottom of a completed unit, I can't quite make out where that screw would go.

I really prefer the GRIMM mount, but my psychology won't let that hole go unfilled. Besides offering support, the hole might allow high pressure soap and rinse water to get in. And that's the side where the fans are. 😐

I've reached out to GRIMM.

Mikey D, the poacher

You must log in or register to post here.