BLI 7237 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific ( Promontory Excursion) UP 4014 Paragon4 Truck while adding 44 grams of

while adding 44 grams of unsprung weight to your TRX-4 for better crawling performance and more stability during steep climbs

This design allows for more steering angle compared to stock

Extended rear body posts are required - NOT INCLUDED

They'll be eating your dust with this awesome tv car from Jada

Offering crews more protection – the original SD60 cab weighs 3

BLI 7237 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific ( Promontory Excursion) UP 4014 Paragon4 Truck while adding 44 grams ofBLI 7237 N Scale Big Boy 4 8 8 4 Steam Loco Union Pacific ( Promontory Excursion) UP 4014 Paragon4 Often called the largest steam loco ever made, and certainly a contender for the Worlds Most Famous Locomotive, the Big Boy was forged under some of the most strenuous demands ever placed on a locomotive. The UP Railroad needed a locomotive that could be used to pull a 3,600 ton train over Sherman Hill and the 1. 14% grade from Ogden to Wasatch, Utah