need help shift linkage

dont know what to do, i purchased a b16a polyurethane mount kit from hcp and did not buy the shift linkage kit. what does the shift linkage do?? my exaust doesnt touch the stock linkage well maybe a litle when i put her in the garage. but thats all. i was wondering if the shift linkage is realy necesary or what it does exactly. all i know is that it has a certain clearance for custom exhaust. please recomend me if i need to buy it or do i stay with the one i have?

the shift linkage kit is just the bushings for your linkages. if your old ones are not worn out then i would'nt worry about it.

the whole linkage kit the two bars that conect to the transmision. if u dont know what im talking about here is the picture. www.hcpengineering.com