Awesome,

That's the same info I was looking for on another thread.

SirCoop

I would use the stock ARP main cap bolts. They work fine.

Be aware that if fitting ARP's S studs, the nuts or the end of the studs may foul the idler gear web in the gearbox. Check it.

Fantastic information. I had them on my list to purchase. Do you think it's worth doing, or would a set of original hardware be a better investment. I'm building a 1380 that should have a good bit of pep.

If you want to use them in a regular 1275, you would need to machine the cap location register off them. A Cooper S does not have hollow dowels to locate the caps, it uses the studs.

Well crap. DRMINI has already listed the 4 that I had. haha.

Your description on the main cap studs says "Cooper S", but I don't see anywhere that specifies Cooper S only.

Here's some-

ARP part numbers:

Rod Bolts:

A Series 3/8"                    206-6001 (Cooper S, non-S 1275, early)

BB Ford   3/8"                  155-6002 (cheaper replacement for above, = 2 sets of bolts)

A & B Series 11/32"           206-6002 (Non S, 1275, late A series)

A Series Cap head 3/8”      200-6207 (850-997-998-1098 Rods)

Head Studs:

A Series, 9 studs                  206-4201

A Series, 11 studs                206-4204

A Series, 11 studs, for decked head 206-4206

Main Cap studs:

A Series                         206-5401 (Cooper S)

So I wanted to start this thread to piggyback on another thread and maybe consolidate everything into one place. I'm looking to see who has the part numbers and kit numbers for ARP's replacement bolts for the A-series engines. There may be a lot of information out there, but it's a good resource for the community. I know I can personally use it and I bet there's a lot of utility in it for others. I'll begin posting what I have when I get back to my computer and I'll update this first post as information is added.