As far as being durable, he might be refering to the 99-00 Si tranny's which have gathered a bad rep over at clubsi.com but I can't say I've had a prob (knock on wood). I had a 95 GSR tranny in an old car of mine that took a dump on me after being abused by a 65 shot and an LS engine. I think the engine and tranny is all relative i.e. just as reliable as the user wants it to be. You want to boost 8lbs on a B16A, you better have suffecient fuel supply and probably NOT jerk through the gears like normal, it will only give excessive wheel-spin that slows you down. That's just my .02