what problems would you expect to encounter if you were trying to install an S2r 800/ S4r header on an S2r 1000?
(we think they might have sent the wrong pipe!)
that it wouldnt be long enough on one end because the s2r1k has a 1 piece connecting to the front head. where the s2r800 has a discontinuity
S4R will not fit the head, as the flange is different.
S2R800 will be shorter, AFAIK won't fit the head either.