I just "pulled the trigger" on a SE Stage IV Kit - 107CI to 128CI Kit fpr my 2018 RGS. I was able to locate 1 at a dealer in Florida an having it shipped to PA. I also ordered the S&S M8 oil pump and billet cam plate, S&S Billet Tappet Cuffs and AIM SDR Variable Pressure Clutch all of which I got from Fuel Moto. I'm already have a Stage 1 (Intake, RCX Headpipes & SVT Boneshakers). I will be tuning with a Power Vision and of course getting it Dynotuned.

Is there anything else that I need?

 

You may want to consider different lifters. I don't trust the SE lifters.

 

Valve springs? A few guys have reported the Harley ones breaking.

And if you're doing all that, you might consider another couple hundred for an aftermarket camshaft?

 

Probably make the cam change after I see how the SE8-517 performs.

 

From my experience, only about 750 miles on my HD 131, I would change lifters, tappet cuffs and cam. At about 550 miles I had a lifter go bad and HD did not want to replace it, my bike is 100% compliant. My dealer had to argue with HD to get them replaced before they came apart and did real damage. The cam is good compared to stock but I like a cam that has more low end. The cam in the kit comes on about 2,800 RPMs. Since you are using so many non HD parts I would go with a better cam. I will be changing my cam, lifters, cuffs, exhaust and tuner in a year or so. I want to ride it with the warranty first, given the trouble I’ve already had.

 

I have the S&S Tappet cuffs on order, I guess I go ahead an order the lifters, Regarding the cam...I'm not quite sure where I want to go with that. The kit comes with the SE8-517, 75% of my riding is long distance (i.e.touring) so I'll have to wait and see how it feels.

 

My bike is all apart with the 128ci jugs on. I’ve been waiting on my extreme CNC port heads from shop Utah Harley since the end of March. I hate waiting. Anyone have the heads in stock?

 

Here's what I did when I fount my 128 kit:

• Go onto the product/item you need on the HD site- https://www.harley-davidson.com/stor...-18-16500749-1
• Click on the "Find in Store" button and enter a zip code. The zip codes you enter should be from random cities/town across the US.

If the item is available at the dealer it will say "In stock"

 

Thanks for the advice!

 

Try zip code 48007, there are a couple of dealers that show contact dealer instead of not available. Same with zip code 32114.