- A Vintage Torpedo .40 engine labeled as "Series 70 Formula". Appears to be K&B's pylon engine back in the 1970s or earlier. This engine is in new condition with very smooth carb and piston movement. Has original glow plug installed and parts/tool/nipple and throttle needle in sealed plastic bag. This has a rear rotor and is a high RPM engine for its time. More of a collector's item in this condition with a good box and no sure how much power these really generated back in those days. What you see is what you get and shipping will be via USPS Priority Mail Flat Rate medium box at $17.00.