If you want something loud ... one of the 70mm exhausts is probably the right choice for you. I had the BYP exhaust on for a while. I quite liked it, but circumstances made me go back to the Powergetter.
Printable View
Have a read, think Stephen had the same dilemma as you
http://forum.clubitr.com.au/showthread.php?t=11139
The power difference would be tiny and barely noticeable, I read 8-10hp difference on some forum. But it is really up to you, 60RS is loud enough for a DD and will give you nice gains. 70RR will make more power but will be loud as F***!...I know which one I'd choose :P
DD = daily driver
BYP and 70rr are similar in terms of loudness (at least when the 70rr has a cat welded on).
Can anybody tell me if the 60rs ends in a single pipe? Trying to think of header options if I decided to go with it!
ends as in towards the headers or muffler?
my FD2R J's racing 60rs ends in a single pipe from both front and back (my engine R18a)
heres my one reving
http://www.youtube.com/watch?v=F0SgyAbUZkM