I have replaced this part as well. Around $100 for the part and labour here in Russia Don't replace the whole exhaust part (IIRC, it includes catalyst converter, so should be very expensive), find the place to replace this cracked thing only (the thing itself costs around $70 + labour).
2001 Isuzu VehiCROSS (build in progress): 4JX1/A340/part time, 2" body lift, front Aisin hubs, rear Aussie Locker, 4.56 gears, OEM rear sway bar disconnect, AirFlow snorkel, cabin air filter
1980 Jeep Cherokee (assembling): 1.5" body lift, TBI, HEI
1987 AMC Eagle: stock