Capristo Ferrari 355 FreeFlow stainless steel exhaust

A cutting-edge design for a perfect fit to your Ferrari F355.

Available for 2.7 and 5.2 models. An increase in power and sound results through more efficient flow of the exhaust system. This exhaust system can be installed directly into existing mounting points. This exhaust system developed by CAPRISTO Exhaust will reflect the true character of your F355. The original design of this system was based solely on improving performance and sound, while the internals of the system were designed to increase flow and reflect the true sound of the Ferrari F1.

< p>Lighter and with better heat dissipation, this exhaust offers better performance (better torque and throttle response).Made of T309 (1.4828) stainless steel (properties close to Inconel)Under certain driving conditions with the valve of the original bypass in the open position, a reverse flow through the silencer causes overheating and damage to the manifolds of Ferrari 355 cars. In these conditions, once the exhaust gas valve is open, the exhaust gases do not all flow through the main catalyst but mainly through the bypass. The exhaust gases flow out of the outlet leading to the main catalytic converter and generate a vacuum. This causes the hot exhaust gases in the muffler to be drawn backwards through the main catalytic converter which further heats the gases.

Then the gases are guided through the bypass and recirculated again into the silencer via the exhaust valve. When the exhaust gas valve is open, this flow of gas circulates incessantly generating more and more heat. We are of the opinion that this problem is known to Ferrari. For this reason the F355 was modified from 2.7 to 5.2 engine in 1996 and the cylinder heads were modified exactly at the point where the vacuum is generated. But the problem was not solved with this measure.

Now you can imagine that an extreme back pressure is created if all the exhaust gases coming from the engine and those sucked backwards have to flow through 1 exhaust gas valve. This is why the F355 does not deliver the power as advertised. After some testing it was clear to us that our theory was right and that the bypass causes this problem. An exhaust gas valve is not sufficient and therefore produces a lot of heat due to back pressure. Our exhaust systems, regardless of racing or customary model, are designed in such a way that the exhaust pipes from the main catalyst lead to the outer end pipes and those from the bypass to the inner end pipes. These tubes do not connect to each other. As a result, it is not possible, when the vacuum is generated in the main catalytic converter, for the hot exhaust gases to be recirculated.

Instead the cold air is sucked in through the external end pipe backwards through the catalytic converter, bypass and valve. Once the cold air mixes with the hot exhaust gases, the temperature of the exhaust gases decreases and so does the temperature of the entire system. Also, the original single bypass valve didn't flow enough gas at full throttle. After recognizing this problem, CAPRISTO exhausts decided to eliminate both problems with a new design.

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