"...in Japan people kept smashing the front ends of their 180SXs when they were drifting... into mountains or whatever. simply put, the S13 Silvia front end was cheaper than a 180SX front so they put the Silvia fronts on as a temporary fix. this caused a craze in Japan and it was basically the look in Japan for young people. Nissan had been observing that many of their 180's have been going around with Silvia fronts, and (for an unknown reason) they built a hybrid and released it in 1994. this hybrid was known as the "SIL-EIGHTY", which is exterior-wise just a PS13 with an S13 front end. changes went further though, with changes to camshafts and the ECU, which gave roughly 16~18Kw more (not sure about how much more torque) than both the Silvia and 180SX. also, the suspension was tweaked for drifting purposes. Genuine Sil-eighty's are snap-tail happy, given too much power thru a corner will result in a drift, maybe a spin if you try too hard... Nissan only made about 400 genuine and documented examples, just about all were snapped up upon their release. now at auctions they apparently go for as much as immaculate R32 skyline GT-Rs"
got this off
http://www.emergent.com.au/200sx/faq_1.html