I've been talking to a few exhaust manufacturers, gathering information regarding full systems for the GSX-S since info seems to be scarce at the moment. I will try to condense it for all the members that are considering getting a full system (because as most of us know, a slip-on isn't gonna do jack ****).
Here's what I've got so far:
Note: Select worldwide on the ebay sidebar to see all of the options. Some are free shipping.
Headers/midpipe only - $713 to $740 (ebay) - replaces stock headers and midpipe. Keeps O2 sensor bung. Can be used with stock end can (very loud) or theoretically with any aftermarket slip on that fits the stock midpipe. 4-2-1 design.
Full System - $867 to $1000+ (ebay) - several options for the end can including shapes and colors. I saw one user on this forum that had fitment issues between the can and midpipe (too loose). Includes removable baffle.
Weight: 4.34 KG headers + 2.17 KG can
Rear wheel gains: +5.6 HP peak. +~10 Nm midrange (torque dip completely gone).
Full system - $857 (sportbike track gear or ebay) - black can tucked under the footpeg for a more compact look. Built-in bungs for o2 and wideband sensors. 4-2-1 design. Removable baffle.
Weight: 12 lbs total
Rear wheel gains: +8.3 HP peak. +~8 Nm midrange (torque dip almost gone).
R11 Full system - $1141 - $1250 (contact [email protected]
) - clean system with 4 color options and a higher profile can up by the passenger footpeg. 4-1 design. Removable baffle. Ships from Japan (up to 2 weeks) but you only pay local shipping from CA.
Weight: 6.1 - 6.3 KG
Gains: +~2 hp peak. +~8 Nm midrange (torque dip still exists but it's much improved).
Full system - $715 (ebay) - TaylorMade style, has a small muffler box where the stock one is so it is possibly not as loud as the other systems which tend to be straight-through. 4-2-1 design. Removable baffle.
Weight: 6.3 KG
Gains: +4.7 hp peak. +~5 Nm midrange (torque dip still there).
Akrapovic told me that they do not plan on making a full system for our bikes. I am waiting to hear back from Remus.
See the attached dyno graphs for each exhaust system. These were all supplied directly to me by the manufacturers except the M4 one, which I found on the forum (still supplied by M4). Keep in mind that they all use different scaling, units, etc. so it is not advised to compare them directly. For example, CS's graph is tall and narrow so it makes the torque dip look a lot worse than Arrow's which is short and wide.