Anyone know where I can buy rings for only 1 cylinder. Need a set for a 4.380 bore.

Machine shop may have a broken set.

I know this will cause a debate, but 440 Source sells single cylinder sets for all b and rb engines sizes. Hope this helps.

my local machine shop was able to order me a single sat and had them in 2 days while the kit supplier told me two weeks, guess they didnt want the hassle

hit or miss really. some shops don't want the hassle of having open sets of rings sitting around on the shelves, and it's easier for them to force you to buy the whole set.

but yes, 440source has "single cylinder" ring sets available from the "name brand" suppliers. I think they're stocking Total seal rings.

if no one local to you will sell you a single piston set of rings, then you can hit of 440S.

do a search with summit racing. they sell single sets

Molly 1/16
http://www.summitracing.com/parts/TSR-CR9190-130-1/
But any parts place can order them in 5/64 if that is your size.

I have a single pack of 1/16 molly 4.380 bore in the garage.
and lot of good used laying around.

I think I have a set but it might be 4.375
I will look.

5/64
http://www.summitracing.com/parts/SLP-WE-424K-60/

I've bought single piston sets from NAPA but paid through the nose for them.