ITS Brake Ducting - Rear

[BeerBudgetRacing]

Jeff,

Really appreciate the information - very helpful....

Q: The new Porterfield race compound - is that R4-S ? They said no such thing as LS....
They said "RD-4 is better for race vehicles that do not generate a lot of heat. R-4 is better for high heat race vehicles and the R4-S is for street use."

They quoted me $249 for RC114 ST-43's....

My first impression: Porterfield is extremely responsive to their customers.....

[JeffYoung]

It was originally called LS or LD something. I went back and looked, it is RD-4. It's specifically recommended for IT cars -- we don't generate as much heat as big old vintage cars with drums, etc.

Try it. Great compound.

Porterfield are great people.

[BeerBudgetRacing]

I'm considering replacing my rear aluminum drums with the all steel. Some people have said the alum will warp, etc.
Since the aftermarket primarily supplies steel the are considered the replacement.

[Matt93SE]

FYI, there is a new supplier of the aluminum drums in the last year or so.
https://improvedtouring.com...um-Brake-Drums

Looks like the site on that thread no longer lists them, but a quick google search shows a few other sites that have them listed- all on backorder. Thus I'm just posting this for information- not sure how far you'll get with it.