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Vivid Racing Gear 
If you're diving into the world of performance upgrades, let me tell you about the Tomei 4G63 Racing Valve Set. This isn't just any set of valves; these are crafted by a company that knows a thing or two about pushing engines to their limits. Tomei kicked off their journey back in 1968 as a race car tuner in Japan, and they've been a big player in motorsports ever since. Their experience really shows in the quality of their products.
These valves are designed specifically for the Mitsubishi 4G63 engine, which means you're getting a tailored fit for your EVO from 1992 to 2007. What's cool about these valves is that they're oversized—35mm for intake and 31.5mm for exhaust. This larger diameter is all about optimizing flow rates, which translates to better performance on both the street and the track. And let's be real, who doesn't want a little extra horsepower?
One of the standout features of these valves is their durability. Racing puts engines through the wringer, and Tomei gets that. They've engineered these valves to handle the extreme heat generated during those high-power runs. You won't have to worry about them giving out on you when it matters most. Plus, with a thinner stem design, you're looking at improved airflow and reduced resistance, making them lighter than the factory options. It's all about efficiency here.
Now, let's talk about the specs. The intake stem diameter is 6.57mm, and the exhaust is 6.54mm, with a stem length of 109.6mm. These precise measurements aren't just for show; they're crucial for ensuring everything fits perfectly and operates smoothly. Tomei pays attention to the tiniest details because even minor discrepancies can lead to major engine issues.
And if you're concerned about installation, Tomei's got you covered with detailed instructions. You can find them here. It's always nice to have a little guidance when you're diving into engine work.
In summary, if you're serious about boosting your EVO's performance, the Tomei 4G63 Racing Valve Set is a solid choice. It's all about better airflow, improved durability, and that extra edge you need to make your ride truly stand out.
Other Part Numbers:
Tomei #163402
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Tomei is one of the most recognizable brands when it comes to performance tuning. The company started in 1968 by Mr. Seiichi Suzuki and initially tuned race cars. Their concept is “To produce a great product for ultimate driving pleasure” which has translated into all their parts, making it a sought-after brand worldwide. Today, Tomei is used by various enthusiasts, tuners, professional drivers, and racers everywhere.
Racing HeritageTomei has its roots firmly attached to motorsports racing. With its experience in creating fast cars for decades, it was able to create parts that are considered as one of the most.sophisticated and technologically advanced parts in the market. Not only does it produce power. It ensures that it maintains its reliability as well.
The company offers a wide range of products, ranging from engine components such as camshafts, valve springs, pistons, connecting rods, cam gears, gaskets, limited slip differentials, exhaust systems, and more. Their parts are designed to perform well, not only on the streets, but on the track as well.
They have various race track records under their belt to prove it.
Purchase Tomei Products at Vivid RacingIf you want to upgrade the performance of your vehicle, then Tomei is the right brand for you. The company has consistently provided its customers with high-perfromance products that deliver what it promised. Using only the highest quality of materials available, which includes Titanium, they are able to develop parts that are strong and lightweight. This is the formula for a better performing engine. Visit Vivid Racing and check out their list of products that would fit your specific requirement.
| Sale price | None |
| Wholesale price | $396.48 |
| Shipping |
Weight: 3.00 Length: 13 Width: 8 Height: 4 |
| Product Added At | Friday 09 October, 2009 |
| Product Modified At | Monday 23 June, 2025 |
| Imported By | ETLOverride |
| Last Edited By | kathI@vividracing.com |
| View In Admin |
| Carb Approved | No |
|---|---|
| Carb Number | - |
| Epa Status | - |
| Prop65 | - |
| Carb Required | - |
| Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Tomei Powered USA Inc | $336.00 | $504.00 | ? | ? | ? | 2025-06-23 11:45:35 |
