Parts supplied by ourselves must be fitted by an approved mechanic/installer. Proof will be required in order for us to process the refund otherwise refund will not be given. Please also ensure that our secure markings are not tampered or removed. Our parts come with a 7 days return to base warranty unless otherwise states. Gearboxes come with 14 days return to base warranty unless otherwise stated. Engines come with a 21 day return to base warranty unless otherwise stated.