Used the product in 2 cars

but doing a in depth review at the moment so doing a week with another week without

so far in my Kia sportage 2011 i notice quieter engine even after 5K of sound proofing. On this alone its worth its salt. Pickup is also better gear shifting is also better

For my older Chervolet Optra. Same with the lower engine noise, Pickup and gear shifting better too. WIth optra its easier to start the engine

ALso i notice a small fc drop. And for both cars you can rev the engine longer before forcing a gear change

Great product so far

how's business did not hear from you when you were down in KL
PM details, as i want to get another set for the kia