David Vizard's PowerTec 10 EP 19 Why valve and port Discharge Coefficients are so important
19:05
David Vizard's PowerTec 10 EP 20 Power enhancing valve pockets
20:32
Going to a Larger Valve Size and Coefficient of Discharge.
29:48
2.3 Mazda 4 valve head ported with great improvements
30:02
David Vizard's PowerTec 10 EP 27 Zero loss sound legal muffler systems
26:39
HOW MUCH COMPRESSION PART I CAN WE RUN ON THE STREETS?
23:11
David Vizard's PowerTec 10 EP 48 How to deprive you opposition of horsepower
12:38
Lamento não ter aprendido este segredo aos 50! Você precisa de saber!
2:03:11