This is one of the most solidly based works available detailing the effects of modifications and aftermarket bolt ons on the performance of Ford s famous 5 0 liter engine Holdener a regular contributor to several Ford magazines has dyno tested virtually every modification and component available from synthetic lubricants and iced intake manifolds and throttle bodies to cams cylinder heads and blowers Actual dyno test figures are provided as well as details on test engine specifications used in each run Ford 5 0 liter performance enthusiasts will benefit from the tens of thousands of dollars worth of dyno test results in this book