Pro-Street

Ford - 221, 255 (4.2L), 260, 289, 302(5.0L) & Boss 302
Performance level 2 - Pro-Street - High torque grind with mid-range and top end power. Delivers mileage and horsepower.
INT/EXH - Dur @ .050” Lift: 212°/216° RR: 1.6/1.6 Gross Lift: .450”/.453” LSA: 114° RPM: 2000 to 5500 Redline: 6000 Learn More

Ford - 221, 255 (4.2L), 260, 289, 302(5.0L) & Boss 302
Performance level 3 - Pro-Street - High torque grind with mid-range and top end power.
INT/EXH - Dur @ .050” Lift: 238°/242° RR: 1.6/1.6 Gross Lift: .478”/.488” LSA: 112° RPM: 2200 to 6000 Redline: 7000 Learn More

Ford - 221, 255 (4.2L), 260, 289, 302(5.0L) & Boss 302
Performance level 4 - Pro-Street - High revving with superior midrange and top end power.
INT/EXH - Dur @ .050” Lift: 248°/252° RR: 1.6/1.6 Gross Lift: .499”/.512” LSA: 110° RPM: 2500 to 7500 Redline: 7500 Learn More