BLI 7238 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific (2 Tone Gray) UP 4023 Paragon4 DCC Signaling Recommended to medium thread lock

Recommended to medium thread lock on screws threading into metal

Correct exhaust silencer per road number

which was eventually replaced by a large script with a square lettering scheme

Lit number boards (effect in DCC)

LEGO® building bricks meet the highest industry standards to ensure they are consistent

BLI 7238 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific (2 Tone Gray) UP 4023 Paragon4 DCC Signaling Recommended to medium thread lockBLI 7238 N Scale Big Boy 4 8 8 4 Steam Loco Union Pacific (2 Tone Gray) UP 4023 Paragon4 DCC 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 without