we're not even taking into account that his buddy may not have a working supercharger set up on his truck? It's more than just power that breaks things it's people incorrectly modifying, rebuilding, working on things as well. Not applicable to this case but forced induction on an 70's era ford automatic c4 with vacuum kickdown will blow it up or at least make it not run right because the transmission decides engine load based manifold pressure and the c4 was never designed to see boost and lowered pressures around town so it would try to stay in low gear, shift funny, and just fail. With automatics you have to consider the engine and the transmission at the same time when modifying as a change on one without thinking about the other will hurt performance or break something. Look at what a valve body mod on a 350z does for it huge gains just by working with the brain of the transmission(well more like the circulatory or nervous system). If you have a manual you're straight because it's just a bunch of shafts, some gears, and a few levers hooked up to your hand and it doesn't give a fart about what you do to the engine (well unless you take the sensor ring off the flywheel for the synchro rev).
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