Ducati GP15 Exhaust Design
Similar to the Honda RC213V, the GP15 is powered by a V4 engine, so Ducati also uses two pairs of 2 into 1 pipes, one starting at the front cylinder head and the other at the rear. There are many similarities between the Honda and Ducati designs, but the two sets of pipes look dramatically different from one another.
With the GP15, Ducati has been very careful about keeping it covered up in public, and I have not yet scored a photo of this bike without fairings. However, I do have shots of the GP14 which, while different in many ways from the GP15, uses the same engine layout and, I believe, similar exhaust routing. So we will start off looking at last year’s bike.
Similar to Honda, Ducati routes the front cylinders’ exhaust pipes around the left side of the oil sump, joining the two pipes into one just behind. Notice how long the single pipe section is on the GP14, a feature that will change dramatically on the GP15.
Ducati often wraps the pipes up with insulation, as shown here where the pipe passes close to the oil sump. Notice also that the two pipes are joined by a bridge just in front of the insulation.
The GP14 routed the rear pipes in parallel but on opposites of the bike before joining them into a single pipe.
Switching now to the GP15, we see that the rear section is different, Ducati taking a page from Honda’s book by routing the rear two pipes along the right side of the bike before the 2 into 1 section. There is an Akrapovic exhaust gate as well, similar to the one on the Aprilia.
To stray for a moment: After years of including a grille on the pipe ends, Ducati no longer includes this protection. As I recall, Ducati was the first team to add this grill to their pipes, and others have followed suit in order to keep gravel out of the engine in a crash. Is this something that actually happens, gravel getting into the exhaust pipe? It sure does, as shown in the next image.
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