Nope, uses SCX lower gears. All their own design.

Anymore info on these drive? Plan on putting them on my 388 slingshot with #6 props. Should have them on by the first of the year.

Looks amazing!

Has anyone pulled the trigger on a pair of SCX-4's for V-bottom twin set-up? Would like to try a pair in a 38 with 750 HP!!!! Pictures & numbers from the current tests would be great. Next question, what would be prop size? Keeping my fingers crossed that this will be the ticket!!!!

sent my SCX uppers back to imco to get recased to the SCX -4 uppers and getting the dedicated lowers also to run # 6 cleavers should be interesting.

also still wondering how that 26 redline worked out , no response ?

Here's a direct quote from Revolution Performance Marine's Facebook page regarding their testing of the new SCX4 on a 26 Redline:

Well after some "Tuning, and testing" it's official, the new IMCO SCX 4 is an awesome drive, boat jumps right up on plane, boat handles like a dream, no real speed gain on the test boat, but no loss either, drive will be much more suited for higher horsepower boats...Jeff's is ordered so we will see...

That sucks they had no speed gain. Even though I am a fan of the arneson I have a lot of respect for the SCX4 and I am glad it came to the market.

Looking forward to more test and tunes shared in the future!

When I called Imco to order replacement steering lines I was told its about 17k plus shipping for the -4 SCX. I think for 3k more you can go Arneson, which is faster, looks bad a$$, and throws a mean roost....
However the SCX is an easy bolt up...

So I guess you have to weigh out the options. Both are major set up changes and may suck.

It's right about 37K for two -4SCX with props, helmets, reservoirs, tie bar, through hulls and strainers. 60K with Arnesons and a boatload more work.
I'm seriously contemplating the -4's vs just a -2 but waiting for feedback on speed and planing ability.
With the Arnesons you have to pull the engines, add through hulls, change the helm and rams but I'm pretty sure you will pick up speed and reliability. I wish they could put a kit together that didn't require new trim and steering components. It could be a bit less expensive??? It also looks cool with the 6 props and roost.
The SCX-4's'll look cool too because they have the #6 props also. Unsure about roost.
It looks like the Arnesons will put the prop a couple inches higher than the SCX's and a bit further back because of the extention boxes. When's the Longshaft -6SCX coming out?