I have a question if I can use 02 to 04 after market Exhaust system on my 05 MCS.......
What is the different design between the 02-04 to the 05 Exhaust?

 

hangars....

if you have a welder, or dont mind some universal clamps and hangars, theres no other difference

 

So if you have a 05 MCS you have to buy a new Exhaust that are design for the 05 only...............

 

no, you can use a pre-04 system, most muffler shops can put new hangars on, just cut em off and reattach them in the right locations.

i wouldnt NEVER take my car to someone to have it done since i can do it myself, but if you dont wanna put in any effort and just bolt on, get an 05 system.