I bought a Wilwood braided stainless brake line kit for my front discs. I have stock calipers on my tall spindle conversion which uses a 12 inch Camaro disc and large caliper.

The kit came with adapters, and I was able to change out the adapter to hard line with the adapter in the kit just fine.

But trying to connect with the caliper just won't work with what is in the kit. I pulled the caliper fitting and the thread size and types are drastically different. No way to make this work without an adapter of some sort.

Does anyone happen to know the size and treads on a stock GM caliper?

Steve

Depends on year model...certain years GM used SAE threads and sizes and others Metric. The GM calipers that I used on my coupe used banjo fittings , copper washers, and bolts

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Hotrodding is much more than just owning a hotrod...It is a state of mind!

This is a late 60's or early 70's caliper so it's SAE.

I just went to the local mom and pop hardware store that never failed to find what I need until today.

So then I went to NAPA autoparts and they would have to order it, but I didn't have faith in the kid behind the counter to guess the right size.

So I guess it's back to JEG'S to call their support line.

You can try a 7/16"-20, but it could also be a 7/16 24...yes it's an oddball thread pitch, but the bolts do exist. You can try a fine thread bolt in the hole to get your correct sizing.


If the braided lines came with the banjo end already swaged on, then the stock type banjo bolt will work with a brass sealing washer on each side. If the braided line came with just the #3 or#4 AN style fitting, then you may need the banjo adapter that will allow you to use the stock type banjo bolt.





http://www.speedwaymotors.com/p/938...tting-Kits.html



One of these might work also.


http://www.speedwaymotors.com/p/647...ee-Adapter.html


Some more fittings available from speedway



Goodridge, Russel and Aeroquip all have collections of adapters and banjo bolts that will get you hooked up.

Summit and Jegs are a couple of other places to try.


Hope this helps, Mikey

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BE different....ACT normal.

No one is completely useless..They can always be used as a bad example

Thanks Mikey! Nice post!

I took the parts down to my local speed shop today to confirm what they were and the guy knew right away. The 90 elbow I took off of there is an AN4 ...he said on both ends,...but isn't the threads on an AN4 exactly what you said? 7/16 20 thread?

A seller on E-bay sent me to this posting which I believe confirms what the guy at the speed shop said?...if the 7/16 20 is the same as AN4? Anyway he sent me to this item...which I believe is exactly what I took off of the GM caliper!

http://cgi.ebay.com/ebaymotors/ws/e...77%26_fvi%3 D1

Now I have the issue of mating it up to the AN3 flex line connector! The guy at the speed shop is ordering a female AN4 to male AN3 adapter at over $12 each side!

The price I pay for not knowing enough to just buy AN4 flex lines!

Steve

The thread size for the GM calipers could be 10 mm.

Speedway offers them re-threaded to 7/16-20. Speedway also has all the fittings for either as well as the AN fittings and hoses.

That must be the newer style GM metric calipers? Mine are the older style late 60's era.



I didn't know that you could get the newer style that are re-threaded to the old style threads! Good info! Would there be any advantage to going with the newer style calipers and would they sit the same spindle as the old style?

Had I known then what I know now I would have bought AN4 flex lines. I sure learned something on this.

Thanks guys!