experience 1 on 4AGE black quad in a AE92 corolla... with reverse back TRD style handmade "quiet muffler" - I think this was the 2nd complete BT swap in Karachi
quietly sitting on 1st red light at toheed towards seaview
civic 2002 VTi pulls up next to me with two youngsters
Im listening to carmina burana o fortuna in the car
they laugh and try to act all speed racer 
green light - they shoot off - and I ease it out at quarter to half throttle (im next to their car)
they shift like lunatics and I mash the pedal at the same time (the intake roar and acceleration was so intimidating) they let go of their accelerator - I torque shift into 2nd spinning the front wheels (original soft struts) - and at the next light they dont do any funny stuff.. LOL
they mustve gone back home with some nightmares - hehe, anyway this engine is very reliable if you use it properly.. if not it will drain your bank quickly - and it wont work on CNG - it may start and run but not WORK