Tubi Style
Evolution
Exhaust for the
Ferrari 355

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The 355's original rear exhaust was a radical innovation when it was first released.

It was one of the only cars, if not the only car, that had an ECU-controlled cat-bypass exhaust channel designed to minimise exhaust backpressure at high RPM to accomodate, what was at the time, a revolutionary high-revving V8 engine (note that this "upper channel" is not, strictly speaking, a genuine cat-bypass channel - it is a "low restiction exhaust channel". The reason is that even in this channel, Ferrari fitted a set of small catalysts to optimise high RPM exhaust emissions for homologation purposes. Today, these catalysts are completely worn and have disintegrated and disappeared on many 355s).

As a result, the rear silencer (and therefore any sports exhaust system for the car) has an unususal configuration - it must have three inlets to feed it.

The system has two "lower" inlets which come out of the left and right catalysts into the silencer, as is standard practice on cars of this type. These lower inlets are used by the engine below 4000rpm. But in addition, the 355 has another "upper" inlet, into which all exhaust gases are sent directly from the manifolds when the 355's cat-bypass valve opens at 4000rpm (and at low RPM in high gear with a wide throttle opening).

The new Tubi Evolution Sports Exhaust is designed to optimise the sound resulting from this layout.

The new Tubi contains two seperate mufflers for each of the two exhaust channels, but combined into one exhaust.

There is a conventional Tubi muffler below 4000rpm (which may be specified in either a level 1, 2 or 3 configuration, depending upon your preferences) to give the 355 that classic deep, full, throaty "Tubi sound". But now, instead of sending exhaust flow into the same muffler at 4000rpm, exhaust flow is sent straight out to a direct-exit channel, thereby minimising backpressure and optimising the 355's fabulous V8-engined howling scream.

This excellent new layout allows you to drive around without too much noise (when specifiying a level 1 or 2 lower muffler), and lets you enjoy the deep and full sound of a regular Tubi at low RPM without it overpowering the driver. But when the valve opens above 4000rpm, all hell breaks loose. The sound reverts to being a full-on F1 scream as exhaust flow is now allowed to directly exit the Tubi silencer.

It truly is the best of both worlds, brought to you by the world's best manufacturer of exhaust equipment for the world's most exotic cars!