Simply put, an engine is a pump. By increasing its ability to ingest fuel and air, convert it to energy, and evacuate the remains, it will make more horsepower. We set out to show just what you can ...
If you've been reading GMHTP lately, you know that the new L92 heads are superior to stock LS1 and LS2 heads. But what happens when you put them to task against one of the best 15-degree heads on the ...