Valve Spring
| Valve spring free length | Intake | 2.101 inch |
| Exhaust | 2.101 inch | |
| Valve spring installed pressure @N 9 spec. length | Intake | 287.19-321.19 N @ 1.676 inch |
| Exhaust | 287.19-321.19 N @ 1.676 inch | |
| Valve springs installed pressure N @ spec. length service limit | Intake | 5% pressure loss @ 1.134 inch |
| Exhaust | 5% pressure loss @ 1.134 inch | |
| Valve springs - out of square limit, | Intake | 2.0° |
| Exhaust | 2.0° |