#1503 - GLOW PLUG MEDIUM/COLD R4
For 0.18 To 0.28ci (3 To 4.7cc) Engines 16% to 25% Nitro
Discontinued, replacement part: #160410
Power Plugs for Nitro car and truck engines! HPI Power Plugs use a unique blend of platinum and iridium metals to produce a range of quality glow plugs that is suitable for hobbyists and racers.
Recommended Power Plugs for HPI engines:
#1502 Glow Plug Medium R3
#1503 Glow Plug Medium/Cold R4
#1504 Glow Plug Cold R5