SET OF 4 SPARK PLUG for LIQUID PETROLEUM GAS LPG BMW 2002TII 2.0L L4 with all engine serial nr. (1974) * 86J2PLPLR15ZCSLU28XP 1. Higher HP and torque by up to 3 % 2. increased economy by up to 10% 3. 360 Firing Technology 4. Improved acceleration by up to 15 % 5. 25,000 miles - 40,000 km duration