I am a car electrician: Ready for a comprehensive engine cleaning service: Here are three packages: Basic Package: Spark plug change / Engine throttle body cleaning / Injector cleaning (only 200 SAR) Medium Package: Spark plug change / Engine throttle body cleaning / Injector cleaning / Engine manifold cleaning (only 300 SAR) Comprehensive Package: Spark plug change / Engine throttle body cleaning / Injector cleaning / Engine manifold cleaning / Exhaust muffler (catalytic converter) cleaning (only 400 SAR) This is for 4-cylinder cars For higher-end cars, by agreement Experience is the best proof Happy to hear from you Abu Saad