Valve Spring, Installed Height - Intake AND Exhaust (Spring seat top to bottom of retainer)

40.0 mm

1.575 in.

Valve Spring, Number of Coils - Intake AND Exhaust

9.35

Valve Spring, Spring Force - Exhaust (Valve Open)

663 ± 30 N @ 9.67 mm

149 ± 6 lbs. @ 0.3807 in.

Valve Spring, Spring Force - Intake (Valve Open)

699 ± 31 N @ 10.6 mm

150.4 ± 7 lbs. @ 0.4173 in.

Valve Spring, Spring Force - Intake AND Exhaust (Valve Closed)

295 ± 13 N @ 40.0 mm

66 ± 3 lbs. @ 1.57 in.

Valve Spring, Wire Diameter - Intake AND Exhaust

3.18 x 3.99 mm (ovate)

0.125 x 0.157 in. (ovate)

Valve Timing (Exhaust Valves), Centerline

119°

Valve Timing (Exhaust Valves), Closes

10° (ATDC)

Valve Timing (Exhaust Valves), Duration

251°

Valve Timing (Exhaust Valves), Opens - Note: Units are in crank degrees, using 0.1524 mm (0.006 in.) valve lift as the threshold.

61° (BBDC) or 241° (BTDC)

Valve Timing (Exhaust Valves), Valve Overlap

N/A

Valve Timing (Intake Valves), Centerline

142° (ATDC)