ive had a zex kit in the past on another car. it's a easy to install kit and worked great. very reliable as far as i could tell. it was great making my quick car fairly quick when i wanted it to go (just a 50shot).
but the issue is charging the bottle itself. it becomes tiresome after a while and the inconsistency in the bottle pressure just makes it more headache. yes you can buy a heater for it and i had one installed. but keeping it inside the car on a hot day is very dangerous.
the remote valve opener wasnt very consistent either. i had one and the mechanical clutch it had did not open/close consistently.
if asked if i'd do one in my Z.... no.
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