Log manifolds for 5.3
#12
10 Second Truck Club
#15
10 Second Truck Club
#20
They are on the Trick website. Rick said they show out of stock because they are built to order.
http://www.shop.trickperformanceproducts.com/Turbo-Manifold-2014-Turbo-Manifold-2014-2015-Truck.htm
http://www.shop.trickperformanceproducts.com/Turbo-Manifold-2014-Turbo-Manifold-2014-2015-Truck.htm