Important Note: For Nissan S13, S14 & S15 with SR20DET Turbo Engines Only

Our EXPREME exhaust manifold is now available for SR20 owners who want a performance upgraded from the genuine exhaust manifold. With our product you can retain the genuine setup and no special modifications are needed to fit the standard turbo. With the SR20DET the exhaust manifold was designed to be close from the exhaust port to the turbine. With the comparison test of our isometric prototype & the factory genuine manifold which also utilizes the same layout, it shows that ours has succeeded in delivering an overall improved performance in both torque and power increase in areas like in the higher RPM range in which you were not able to utilize before. With our extensive testing we have reached the conclusion that the normal design is superior as a total overall efficiency. So to develop an exhaust manifold similar with the design and setup as the factory manifold we were finally able to produce a product worthy to bear our name as a product that has the potential to deliver an overall increase in performance.

Compatible Models

(R)PS13/S14/S15　with SR20DET engines (With ABS)

Compatible Turbines

Genuine and aftermarket bolt on turbines

Material

SUS304 Pipe diameter:φ42.7 Pipe thickness: 2mm

1. Acquiring preeminent turbine response

Acquiring the preeminent turbine response, by utilizing a short piping layout.

The most equal length manifold tubing bends upwards, increasing the distance to the turbo and reducing response/spool times. Shorter, unequal length design reduces the distance to the turbo, improving spool and response.

2. Excessive anti-pressure rise is prevented even at high RPMs. Ideal exhaust efficiency is obtained.

TOMEI EXPREMEs exhaust manifold for the SR20 is designed with a partition plate inside the 1st & 4th turbine side ports as the 2nd & 3rd are divided for the exhaust ports. The sequential ignition firing order of the SR20 (1-3-4-2) can cause exhaust interference. The exhaust is discharged from both left and right of the partition plate and can cause to happen where the pipes all merge together. Now TOMEI has found the best possible exhaust flow.

3. Support Bracket

The support bracket is included, so there is no need to worry about the products strength.

4. TITAN Exhaust Bandage.

Heatproof for temperatures of up to 1200℃and dissipating 90% or more of heat effectively. Helps you extract more power from your engine by reducing the oil temperature and also the engine bays temperature which can affect the air intake temperature as well.

5. Japans Vehicle Road Inspection System.

This is compatible with the (R) PS13 EAI mechanism and blow-by separator. The EXPREME Bandage is also included in the kit to comply with the Japanese street legal road regulations for the vehicle inspection

The EAI correspondence type TOMEI turbine outlet pipe (Sold separately) can be easily installed with the use of our exhaust manifold.