| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
Internal engine components require professional installation. Cylinder head bolts must be tightened to precise torque and angle specifications. Incorrect assembly can result in gasket failure or engine damage, voiding any warranty.
Opened or test-fitted cylinder head bolt kits are non-returnable unless incorrectly supplied. All items must remain unused, clean, and sealed in original packaging for eligibility.