- Joined
- Aug 9, 2012
- Messages
- 1,408
- Location
- California
I agree with Ronin that it may not damage the engine but on the flip side I understand why it may void the Ducati's warranty. Ducati basically warranty the performance of the bike. As we all know changing the diameter of the of the header changes the torque either higher in rpm's (larger diameter) or lower' rpm's (smaller diameter) or the change in length which causes a change in the torque's curve longer primaries provide more torque below the peak and reduce it past the peak. Shorter primaries provide more torque above the peak at the expense of below-peak torque. Imagine every complaint Ducati would possibly get from people (who ride on the streets) because most people would like to get that fat header like the WSBK or SSTK headers only to find out that it runs like crap on the streets no low or mid range, Fueling sucks, etc. Ducati dealers has a set of test parameter with their stock headers, slip on's and Full Termi that they have chosen. They possibly couldn't know what performance parameters each and every single aftermarket exhaust would give when they work on your bike so they just limit it for warranty repair. It makes good business sense to do so.