Just got off the phone with ARP regarding their Duramax balancer bolt. I had issues with my fan running into the head of their bolt.
I ordered kit 129-2502 (bolt and washer).
1. ARP balancer bolt comes with a washer too large in diameter for ATI balancer. Must reuse the washer that comes with ATI balancer.
2. ARP has a redesigned balancer bolt for Duramax with shorter head to clear fan. They're sending me one.
Not sure when they came out with the new design, but I got my bolt from Summit last spring.
I ordered kit 129-2502 (bolt and washer).
1. ARP balancer bolt comes with a washer too large in diameter for ATI balancer. Must reuse the washer that comes with ATI balancer.
2. ARP has a redesigned balancer bolt for Duramax with shorter head to clear fan. They're sending me one.
Not sure when they came out with the new design, but I got my bolt from Summit last spring.