In a single scroll AKA undivided manifold, the exhaust gas pressure pulse from cylinder 1 is therefore going to interfere with cylinder 2’s ability to expel its exhaust gases, rather than delivering it undisturbed to the turbo’s turbine the way a twin scroll system allows. For example, if a four-cylinder engine’s firing sequence is 1-3-4-2, cylinder 1 is ending its expansion stroke and opening its exhaust valves while cylinder 2 still has its exhaust valves open (while in its overlap period, where both the intake and exhaust valves are partially open at the same time). Similar in concept to pairing cylinders on race headers for N/A engines, twin scroll design pairs cylinders to one side of the turbine inlet so that the kinetic energy from the exhaust gases is recovered more efficiently by the turbine. Twin scroll turbo system design addresses many of the shortcomings of single scroll turbo systems by separating those cylinders whose exhaust gas pulses interfere with each other. True twin scroll design spools the turbo faster with better VE and more power from idle to redline.Thick wall stainless steel construction.Nissan SR20DET T3 Twin Scroll 44MM External Wastegate Turbo Manifold features: Combining the ultimate performance and durability with Full-Race’s legendary craftsmanship, this manifold can produce more power than any other configuration on the market and is sure to stand up to even the most demanding Nissan enthusiasts. The result is a manifold which can fit almost any twin scroll T3 turbo while maintaining all accessories (PS, A/C) and a full length radiator. Starting with a blank sheet of paper, utilizing years of race winning experience and new ideas, Full-Race engineers designed the twin scroll manifold from the ground up. This manifold is Full-Race’s answer to the most competitive market in the sport compact industry. Nissan SR20DET T3 Twin Scroll 44MM External Wastegate Turbo Manifoldįull-Race is proud to announce the release of the long awaited Nissan T3 twin scroll turbo manifold for your S13/S14/S15.

Tial 44mm wastegate