Here is what is going to be on the back of the p15-d24 tee shirts:
Wide-Range Performance - Economical Engine Speed - Streamlined Engine Installation - Six Cylinder, L-Head Design - Floating Power Engine Mountings - Light Weight Aluminum Alloy Pistons - Balanced Rod and Piston Assembly - Four Rings per Piston - Precision-Type Bearing - Oilite Bearings - Burn-Resistant Exhaust Valve Seat Inserts - Silent Chain Camshaft Drive - Economical, Efficient Fuel System - Power Plus, High-Compression Ratio - Positive Action Fuel Pump - Heavy-Duty Oil-Bath Air Cleaner - New Oilite Fuel Filter - Automatic Manifold Heat Control - Improved Intake Manifold - By-Pass Thermostat for Quick Warm-Up - Directional Cooling with Water Distributing Tube - Full-Length Water Jackets - New Rotor-Type Oil Pump - Full-Pressure Lubrication - Sludge-Free Floating-Type Oil Intake - New "Micronic Filtration" Oil Filter - Efficient Crankcase Ventilation - Air-Cooled Generator - Moisture-Proof Ignition Coil - Generator Voltage Regulator - Knock-Free Calibrated Ignition