i have a both a DC5R and DC5 base model. in the base i have a cat back Hi-Tech exhauste and today i took them to the workshop to put the catback on the R and stock R exhauste on the base. after they took both exhausts out they found that they're different, and had to modify them to fit. isn't that wiered? i always thought they're exasctly the same. a lot of ppl who sell aftermarket exhausts reckon it wud fit staight into the R and the base. well apparantly it dosnt!! just thought id share that with yous