Hi guys,
this is the info I've gathered on 1000/1100 exhaust reference through parts list and the net...
Indeed 1000 and 1100 are interchangeable, but bear in mind that all mufflers don't have the same exit diameter (20, 21, 24 and 26.5mm AFAIK) and "decorative" 6 holes surround.
Downpipes diameter always 41mm (750 exhausts 38mm).
Diameters in mm.
Left prefix Right prefix Suffix Bike 1 Bike 2 Downpipe dia. Center hole dia. Holes Stamped code
14302 14301 49300 GS1000SZ 41 26,5 7
14306 49300 ? 7
14302 14305 49300 GSX1100SZ GSX1000SZ 41 26,5 7
14306 14303 49301 GS1000SZ 41 21 7
14306 14305 49301 GSX1100SZ GSX1000SZ 41 21 7
14306 14305 49302 GSX1100SD 41 7
14302 14301 49310 GSX1100SZ GSX1000SZ 41 21 7 x4931x
14306 14305 49311 GSX1100SZ GSX1000SZ 41 26,5 7 x4931x
14306 14305 49312 GSX1100SZ GSX1000SZ 41 21 7 x4931x
14306 14305 49313 GSX1100SD 41 7 x4931x
14306 14305 49314 GSX1100SAESSL 41 24 1 x4931x
14302 14301 49340 GSX1100SXZ 41 7
14306 14305 49342 GS1100SD 41 (4935A)
14306 14305 49344 GSX1100SAESSL 41
14306 14305 49350 GSX1100SD 41
14306 14305 49370 GSX1100SR 41 7 x4937x
14306 14305 49371 GSX1100SY 41 20 7 x4937x
(Sorry the table does not show well - can send the Excel file for those interested).
BTW, will gladly receive any measurements and info from everyone's pipes to make a thorough table !