In the first three installments of our Great Crate Update series, we tested a wide range of modifications on our GM Performance Parts (GMPP) LS2 crate engine. After installing two different types of ...

Chevy fourth generation aluminum big-block head is readily i.d. 'ed by "bow tie" emblem and new square exhaust ports that exit ¾ inch higher than previous D-port design. You'll have to drill new ...

More than 20 years after the first Gen III LS1 V8 rolled off the assembly line for the 1997 Corvette, it seems there are LS cylinder heads everywhere, and even more stories that have tested and ...

The key to horsepower heaven is in the shape of the cylinder head. Inside these castings, ports direct airflow to and from each cylinder. Since horsepower enthusiasts often attempt to improve their ...