UPDATE - Cracked Manifold 20,000 miles after install. Pacesetter sent a replacement manifold, which also ruptured. At the same time I bought a Pacesetter header for the other side of the engine and that also broke after 30,000 miles. So that's 3 headers cracked through a couple of welds, not just a hairline crack! Pacesetter's warranty process is quite reasonable and they send a free replacement (4th distributor) but it still takes time and effort (or money) to install, hence the reason for the