main cap walk

My opinion and I like and use 440source stuff I wouldn’t use that damper if someone gave it to me. I cheaper out once and bought a Summit damper and it spun. You didn’t give much info such as compression and type of heads on your build but if you are down to the copper after only 12,000 miles you have some issues going on. Everyone wants to jump on the girdle bandwagon but I’ve run lots of 8 second passes without one and will do it again. No concrete either. I save that for swimming pools.