did a clearance sale on them a couple of years back. If I remember correctly, it was ~$920 shipped for 8 of them. I got 2 extras for when they start to crap out again. When I had the manifold off, I dremmeled cut outs for all of the blocked cap screws. That way it will be ultra simple to replace any one(or two) of them. No waiting for parts, back on the road in less than an hour!