
Special engraved Akrapovic verification code on the muffler inlet cap.
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Measurements of the Akrapovic RACING OPEN & EVOLUTION OPEN system on the Kawasaki Z 1000:
The power curve shows a huge increase over the stock performance figures. It is much more linear, which means the engine is pulling strong and consistently right from the lowest rpm to the highest part of the overrev range. We measured a maximum increased power of 10.0 HP at 10270 rpm.
The same goes for torque, which is also increased through entire rpm range. The drop-outs in the stock curve are filled and like the power curve, there is a major increase from 4000 rpm on.

|
Stock | Akrapovic | Max. increased power | ||
| Max. rear wheel power (HP / rpm) | 116.2 / 9835 | 124.3 / 10030 | 10 / 10270 |
| S-K10R4-RC | Racing Line Carbon |
| S-K10R4-RT | Racing Line Titanium |
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