Thread: Help identify lightweight flywheel

The last owner had a lightweight flywheel already installed on the car. I am parting the car out now, and I am curious if anyone has any idea what brand of flywheel this is. It is around 10lbs, is one piece, 108 tooth, and someone inscribed the serial number H6-FS0337H-2043. The only flywheel I found that looks like it is the JUN version, only because of the shape of the outer holes. Any thoughts? Thanks.

For what it is worth,I have a Jun,and it does not have them holes.

There are a couple different versions of the Jun flywheel, Lightweight and UltraLightweight, I used to have an Ultralightweight in my first SE-R back in 03 and I have yet to see many people with them. They are pretty much impossible to find now a days probably because there are much cheaper options.

Either way it has holes like that but they are the same size all around and the flywheel looks a bit different.

My Jun id the lightweight,not ultralightweight.11lb
It was BNIB,and has no holes.
That is a fact....Did your Ultralight have them holes,ashton?

Well I guess it is a JUN flywheel.

Yes mine had those holes. Its definitely the Ultralightweight version. Its been a long time. I thought all the holes were the same size but guess not.

Its a nice flywheel.

Its interseting how the holes are different.
It looks like it is to balance the weight from the guidepins.
The smaller holes are relative to where the dowels are.

Its a nice flywheel for sure. Expensive brand new. Which is why not many are around now since there are soo many other options that are half the price.

So will this work on my 01 P11 RR motor? It appears from the flywheel thread that it will work fine since it is a 108 tooth version. I need to replace a noisy TOB soon, so I was considering keeping it now.

If im not mistaken it will be fine.