Will arp ls1 main studs work in an Lsx block?
I see that TSP has 2 diff part # on there web site.

 

There is a revised ARP main stud for the LSX blocks. One part number uses a 17mm nut, and the other uses a 16mm nut. The smaller nut is what you are gonna want to use for the LSX block because the holes for the main stud/bolts are closer to eachother than the OE LS series blocks.

 

The LSX block uses the same bolt spacing and same fastener sizes as the LS7 and LS9.

 

hm, i used my studs out of my ls2 block on my lsx. they are still in there.

 

Ever built one?

 

Yep they are the same ones. They are closer together like KCS says so the really big ones don't work that well. The 234-5608 has been revised several times now.

 

Yes I have.