In the last installment we left off installing and dyno testing Pypes hi-flow exhaust system on our buddy Tim Cairone's '87 Buick Grand National. We realized gains of 38 hp and 35 lb-ft by ditching ...

HOT ROD has long considered turbocharging the performance tool most compatible with the ever-increasing need for power which can be delivered with economy and low emission levels. The induced ...

When two equal turbochargers work independently, it's parallel. If a small turbocharger operates at lower rpm, then a larger one at higher rpm, it's sequential.