No no no, These are 1/8 shocks.
Here's a current link
http://www.ebay.com/itm/Mugen-1-8-M...Control_Parts_Accessories&hash=item4d22d3f76c
MIGHT require a tiny amount of modification. Ive had guys who didn't need to and some that did. So its questionable if you'll need to do anything extra.
Here'a what Might need to be done if anything.
The stock shock will also have a decent wear spot where it will show you what needs to be trimmed down. The ONLY other thing i can suggest is to either Twist the stand off the little pin goes through, OR you can shave the plastic Bushing thats in the shock cap to clear the hole.
You can see in this picture how the pin is Right up against the plastic bushing, I have since twisted the Stand off and centered it. But either or will work. I just suggest using BIG HONKIN Plyer's as to not mar up the back side of the stand off.
Ive also had a few member's who didn't want to mess with the stand off/shave the plastic bushing and run the Stock Little pin. I DO NOT Suggest this. Steel on Aluminum like the stock shock is NOT ideal and the shock cap WILL wear out over time. With the plastic bushing it will take YEARS of racing to wear out.
Oh and any question's, BY all means fire away.
YES i run a different spring than what comes with the mugen shock, I run a Kyosho spring thats not exactly cheap at 15$ a pair. Part # can be supplies if needed.