MCS-526284 - 3/8" (9.5mm) thick insulating block/insulator block. Fits all 40-47 Knuckle; 48-65 Panhead and 52-56 K models with stock carburetor with 4-bolt Linkert manifold. OEM replacement reference 29250-55; 27412-48 / 1121-48 insulating block.

Fitment:
40-65 OHV B.T.; 52-56 K/KH. With 4-bolt Linkert (NU)