If you're a Subaru STI owner from 2008 to 2020, you know that the head gasket is a critical component in your engine's performance. That's where the GrimmSpeed EJ25 Head Gasket Sets come into play, setting the benchmark for quality in aftermarket replacement gaskets. Whether you're refreshing your stock engine or building a high-horsepower track beast, these gaskets are engineered to meet the demands of your specific setup.
GrimmSpeed has built a reputation for excellence, and their EJ25 Head Gaskets are no exception. Crafted with a multi-layer steel (MLS) construction, these gaskets ensure optimal sealing of both the combustion chamber and the surface area as they are torqued down. The top and bottom layers feature a Nitrile Rubberized Coating, designed to accommodate rougher surface finishes of up to 50 microinches, effectively sealing non-critical areas and minimizing the risk of leaks.
Engine builders and tuners agree: having the right gasket thickness is essential for maximizing performance. That’s why GrimmSpeed offers these head gaskets in multiple thicknesses: 0.78mm, 1.1mm, and 1.5mm. This variety allows you to fine-tune your build, whether you're pushing for extra power or simply doing a refresh. Plus, the slightly oversized bore diameters support up to 0.5mm overbore, giving you the flexibility to customize your engine even further.
Subaru STI owners have praised these head gaskets for their reliability and performance. One owner mentioned, “After installing the GrimmSpeed head gaskets on my 2015 STI, I noticed a significant improvement in sealing. I’m pushing over 400hp now, and these gaskets are holding strong without any leaks!”
With the GrimmSpeed EJ25 Head Gasket Sets, you're not just getting a product; you're investing in the performance and longevity of your Subaru STI. Upgrade your engine today and experience the difference that quality gaskets can make!
Other Part Numbers:
GrimmSpeed #GRM124004
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2008-2020 Subaru STI |
STI | 2008-2020 |

Grimmspeed is an automotive aftermarket company that was founded in 2006 by Justin Grimm. They specialize in creating parts for the exhaust system for various automotive vehicles. Grimm has always had this passion for cars and had always wanted to improve his vehicle’s performance. After numerous trials, he was able to perfect his craft and later on decided to turn it into his career. Today, they have become one of the leading brands when it comes to producing high-performance exhaust systems.
Expanding their Product OfferingThe company initially manufactured parts for Subaru. But as the company expanded, they started offering parts for other brands such as Ford, Mitsubishi, Hyundai, and Mazda. They now offer parts such as intercoolers, intake, exhaust, engine pulleys, gaskets, boost controllers, phenolic spacers and so much more.
Continuous Product DevelopmentGrimmspeed never stops in finding ways to produce innovative products and is always on the push to keep their products up to date. With the rapid change in automotive technology, it is a must that their product is able to adapt to this change for it to satisfy the demand of its users. This is the reason why the company has gained the trust of many tuners all around.
Purchase Grimmspeed Product at Vivid RacingBuilt by an enthusiast for fellow enthusiasts.
If you want a product that is designed to improve the performance of your vehicle, then Grimmspeed is the brand for you. To know more about Grimmspeed, visit Vivid Racing and check out their list of products that would fit your specific needs.