Boost Logic R35 Magnum 4.5″ Titanium Exhaust – Valved Section Upgrade(Muffler section only — requires re-use of your existing tips.) Unleash the ultimate balance of power and control with our boost-activated valved muffler upgrade for the Magnum 4.5″ Titanium Exhaust. This system offers a refined, subdued tone while cruising under 7 psi, then transforms instantly as the valves open above boost, delivering the raw, aggressive sound and maximum flow your GTR deserves. On average, the valved system reduces sound levels by roughly 10 dB compared to the non-valved version, making it significantly quieter and more livable for daily driving without sacrificing performance when it’s time to push the limits. Engineered with precision, the valved design ensures zero compromise—no unwanted back pressure or performance loss when the valves are closed. Once opened, the system matches the flow and power potential of our full race-bred exhaust, making it the perfect solution for drivers who demand both street manners and uncompromised performance. Specifically designed for our Boost Logic Magnum 4.5″ exhaust systems only.
