Proform’s new self-locking header bolts are the simplest way to secure your header bolts without having them loosen up over time. An amazing pair of pre-installed washers do all the work. When the bolt is tightened, the washers engage the bolt head and the header flange. During vibration the bolt will try to loosen itself, but cannot because the step shaped teeth between the washers are taller than the bolt can stretch. Available in 3/4″ and 1″ lengths. Please visit www.ProformParts.com for more information.
Post time: Jun-12-2017