Valvetronic Design Ferrari 488 GTB Valved Sport Exhaust SystemWhen Ferrari decided to ditch the glorious 4. 5 liter naturally aspirated engine in favor of the 3. 9 liter twin turbo, Enzo shuddered in his grave. Gone was that glorious 9,000 redline, replaced with boost noises. From the factory, the 488 GTB is incredibly subdued, but with our exhaust setup and free flow front pipes, that all changes. Out of the turbos, our mandrel bent free flow front pipes measure 3. 0 inches bringing out incredible turbo spool