Modern internal combustion engines are under a lot of stress during normal operation. In particular, there's a lot of tension between the cylinder head and the engine block, especially in diesel ...

Aftermarket head studs are vital for high-performance engines with high compression or turbochargers, both of which experience extremely high internal cylinder pressures. ARP studs are a popular ...

After purchasing a brand-spanking-new Harley, it's time to start doing what we do best and hot rod that sucker. Most of our Harley tech stories up to this point have concentrated on bolt-on parts for ...

Can I reuse head bolts? It's a broad question, so the answer is mainly yes and sometimes no. It depends on the application, meaning what engine do you have and how do you intend to use it? The one ...