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Full-Race Twin Scroll Turbo Manifold (AC & O.E Radiator) Mitsubishi Evo 4-9 4G63

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$1,399.00 (You save $6.49)
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Product Description

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. The result is a Manifold which can fit almost any twin scroll T3 or T4 turbo (up to 67mm) while maintaining all accessories (PS, A/C) AND a full length radiator. Combining the ultimate performance and durability with Full-Race's legendary craftsmanship, this manifold can produce a bigger powerband than any other configuration on the market and is sure to stand up to even the most demanding Evo enthusiasts. 


Full-Race Evo Twin Scroll Turbo Manifold features: 

  • Thick wall stainless steel construction
  • Your choice of dual Tial MV-S (38mm) or 44mm wastegates
  • Precision robotic TIG welding
  • True twin scroll design spools the turbo faster with better VE and more power from idle to redline
  • Lifetime Warranty

Full-Race's highly evolved Twin Scroll Turbo Manifold for the CT9A Mitsubishi Lancer Evolution is the ideal turbo setup for road race and time attack applications. Sierra Sierra is currently the World's Fastest Time Attack team, hitting a macking 298km/h at eastern creek, and chooses to run the Full-Race Twinscroll kit, with Borg Warner EFR 9180:


GT4088R Dyno Results
2.4L Evo 8 w/ Twin Scroll 40R VS Single Scroll 37R this build has a psycho power band for a true street car -- 200lbft @ ~3600rpm and 500 lbft @ 5000rpm, then 600lbft @ 5300rpm.

Red line = Twin Scroll 40R (new setup) compared to blue line = Single Scroll 37R (old setup). Note the big difference in "area under the curve" from his new round of mods (turbo kit, head, ignition) The approximate gains with the 40R vs 37R are:

  • 2000rpm +5hp, +20tq
  • 3000rpm +20whp, +40tq
  • 4000rpm +50whp, +65tq
  • 5000rpm +150whp, +150tq
  • 6000rpm +60whp, +60tq
  • 7000rpm +30whp, +5tq

Application Notes:

  • Stock Radiator Fan will not fit 4" inlet turbos (Slimfan required). Applications such as Time Attack or Endurance racing which require huge CFM for extreme water temps should use the SPAL fan (SPAL 30101504). It flows about 50% more CFM than our standard unit and draws 50% more amps (12 instead of 8amps).
  • Dump tubes are not included
  • The stock evo turbo's water lines are recommended to be used for watercooler GT30R and GT35R Evo's.
  • All twinscroll T4 Evo kits with BorgWarner turbochargers should notch the motor mount slightly to give more clearance for the 3" compressor outlet.
  • When using a Borg Warner EFR turbo with this manifold, clearance must be made on the front transmission mount area using a small grinder, or dremel type device. The following photos explain this:


About Twin Scroll: 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. 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. 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). 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. 
The result of the superior scavenging effect from a twin scroll design is better pressure distribution in the exhaust ports and more efficient delivery of exhaust gas energy to the turbocharger’s turbine. This in turn allows greater valve overlap, resulting in an improved quality and quantity of the air charge entering each cylinder. In fact, with more valve overlap, the scavenging effect of the exhaust flow can literally draw more air in on the intake side while drawing out the last of the low-pressure exhaust gases, helping pack each cylinder with a denser and purer air charge. As we all know, a denser and purer air charge means stronger combustion and more power... but the benefits of twin-scroll design don’t end there. With its greater volumetric efficiency and stronger scavenging effect, higher ignition delay can be used, which helps keep peak combustion temperature in the cylinders down. Since cooler cylinder temperatures and lower exhaust gas temperatures allows for a leaner air/fuel ratio, twin scroll turbo design has been shown to increase turbine efficiency by 7-8 percent (faster spool, quicker response) and result in fuel efficiency improvements as high as 5 percent. It is wise to size the turbine housing A/R larger than the single scroll turbine A/R typically used!

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