TwinPower unveiled its new performance-driven components for Harley-Davidsons, including steering-damper kits and high-flow ...

Our 1999 GT project has a ProCharger shoving more air into it than it could ever ingest on its own, but that doesn't mean there isn't more room to make our engine a better air pump. All that ...

OBJECTIVE: Wet flow, pressure excursions, port volume, runner length, plenum volume—all these figure into an engine's overall efficiency. But there's more… Sometimes theory is neat, but sometimes it ...

The Special K swap is the Holy Grail of Honda swaps currently, giving Civics from as far back as the EF era of the early ’90s more displacement and 21st century power and technology. In many cases ...

Cummins engines used in Ram Heavy-duty trucks are famous for making insane performance gains with simple upgrades. Road-going truck owners just need to toe the line and keep their modified diesels ...

Chevy's small-block Vortec heads can be an engine builder's secret weapon, thanks to the improved flow and potential for ...

Intake manifolds may not be the most well-known automotive components, but that doesn't take away from their importance. These devices are responsible for sending a precise mixture of fuel and air to ...

A cold air intake can bring real benefits to your V8 engine's performance and power, delivering greater airflow and bolstered ...

Our 1999 GT project has a ProCharger shoving more air into it than it could ever ingest on its own, but that doesn’t mean there isn’t more room to make our engine a better air pump. All that ...