How I Tune HPI K4.6 Nitro Engines In a Savage 21 Monster Truck!

This is what I did, make of it what you will... I hope it helps some of you! Want to send me something? My PO BOX: Haggard RC PO Box 1976 STANFORD-LE-HOPE SS17 1BS My Amazon Wish List https://www.amazon.co.uk/hz/wishlist/... Join this channel to get access to perks:    / @haggardrc   You can help me make better content by donating Via PayPal as a gift to RustySkullProductions@hotmail.com! Or you can use this link: https://paypal.me/RustySkull Every penny that is donated will go into making good quality videos for all my loyal subscribers! Many thanks to you all :) #NitroRC #HPISavage #HPIK4.6