SOHC - Xtreme Energy: Hot street, 3.55-3.73 gears, 2000+ stall, rough idle. Requires custom tuning.; 274/278 Advertised Duration, 236/240 Duration .050", .500"/.500" Lift, 114 Lobe Separation; Requires cam gear set part #10246SET; Requires part #26113-16 valve springs and either 792-16 steel retainers or 791-16 titanium retainers; Part #26125-16 high load valve springs also available