After extensive research and development, the TOMEI EVO exhaust manifold is now avaliable.

Holding the same quality as our other Expreme exhaust components, this 4G63 EVO exhaust manifold is a perfect balance of ingenuity and is more efficient through numerous R & D testing.
In the early stages of development, we worked with the original exhaust manifold to find the true limits of the factory production piece. After gathering numerous data from the original equipment tests, we slowly pieced together our Expreme exhaust manifold.

The 4G63 Expreme manifold is one of a kind in design. Starting off with its smooth curves, the Expreme exhaust manifold has excellent flow characteristics. The tubing used has a diameter of 45 and is considered to be the best size when achieving for maximum torque. The material used for the piping and flange is aircraft quality SUS304 stainless steel. This material is very durable against corrosion and other harmful elements. Though in time, a light discoloration may be present, it is to be noted that this material will not deteriate. The process used to assemble this manifold together is know as the lost wax method and is very advanced in the sense that it helps promote strength and long-lasting structural integrity. Along side this well developed manifold is a manifold accessory known as a heat shield. This one off in design heat shielding device is also made from durable SUS304 stainless steel. When attached, to the exhaust manifold, this Expreme heat shield will help promote cooler under hood temperatures, thus other peripheral engine devises will have cooler and longer lasting run times.

1. Everything made from the lost wax method

Initial development investments were required, but the final product quality has paid off substantially. Numerous installations have been made in Japan and never once did the user experience and installation troubles or mounting difficulties.

2. The Expreme Stainless Steel Plate is the proof of high quality.

The manifold has a stunning shine, and when topped off with our trademark, it symbolizes a product which you know has been rigorously tested for perfection.

3. Lost Wax Flange

The engine exhaust port and exhaust manifold flanges have been enlarged ever so slightly to allow for a stronger mounting point, yet promote a perfect seal. And lastly, the manifold and turbo flanges is also enlarged to promote a more effective seal.

4. Additional sealing bolt is included for AT Wagon cars

With the addition of this extra bolt it will be possible to install our product on AT transmission cars

5. Ultra light weight

Our Expreme product is a lot lighter than the factory genuine product which gives you that added benefit for weight reduction on your car.

OEM Weight: 6.8kg

TOMEI EXPREME: 3.6kg

6.　The Expreme heat shield is also made from SUS304 material. (Sold Seperately)

This heat shield can also be used on the standard exhaust manifold.

This exhaust manifold is easy to install. (It is possible to retain and use the MITSUBISHI factory heat shield too)

Having the heat shield, exhaust manifold,
outlet component & front pipe used
together gives you the best possible exhaust system. 

Complete 4G63 Exhaust manifold set fitted.