I haven't re-installed my upgraded to S-trim but as of a few weeks ago i was daily driving/drag racing mine with 9# of boost and 250,000 on the clock.
I am debating putting the S-trim on as we speak due to fear of destroying my engine.
Jarrod
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87GT Vortech S-trim, 155intank pump, 24# injectors, 75mm pro-m, cobra intake, exhaust, 3.73's, mega bite jr's, Central coastal mustangs drag springs and some other freebies.