87 mr2 questions (help)

i have a 87 mr2 non super-charged and i am lookin to get a new exhaust system i was planning on gettin the pacesetter one is it worth it ?

also on my engine it says 4age as the block but is it the same as the 4aglc

would this fit http://www.sfxperformance.com/parts/PAC881373.htm
please help

sorry i ment what is the difference between the 4age and the 4agelc the pace setter saya it fits the 4agelc says nothing about the 4age and it says 4age on my timing belt cover so i am assuming i have a 4age is there a differnce between the to i need and exhaust badly