You have it back words. The arb is instant. The elocker seem to take longer. At least oem dose.
I would add both are plenty strong for that 20r
Also ask your self do you want on board air.
Thanks for the input gentleman.The Harrop is a bit different than the OEM set-up and engages (imo) much faster than oem making it pretty damn close to the ARB setup.
My .02 would be to leave things where they are at. If you already have onboard air, which if you have an ARB up front I would assume you do the tough part is done. The couple of Harrops I've installed all seem quite capable of handling the task out back.
It will have my go-to Puma 12v compressor.
Not sure quite yet, I won't have another opportunity like this to do it for a while I hope, so, I may...
I should open up the front just see what I'm working with anywho.