Select the year of your Subaru Forester XT:
GrimmSpeed EJ25 Head Gasket Sets
When it comes to head gaskets, GrimmSpeed has established itself as the go-to brand for quality and reliability. The GrimmSpeed EJ25 Head Gasket Sets are engineered for Subaru enthusiasts who demand the best for their builds, whether you're refreshing your engine or pushing for track-ready horsepower.
Why Choose GrimmSpeed?
These head gaskets are not just any replacement parts; they are designed with a multi-layer steel (MLS) construction that ensures optimal sealing under pressure. The top and bottom layers are treated with a Nitrile Rubberized Coating, allowing them to conform to rougher surface finishes (up to 50 microinches) and seal non-critical areas effectively. This means fewer leaks and increased durability, especially under extreme conditions.
Tailored for Performance
Engine builders know that one size doesn’t fit all. That’s why the GrimmSpeed EJ25 Head Gasket Sets come in multiple thicknesses—.78mm, 1.1mm, and 1.5mm—allowing you to match the gasket to your specific engine setup. Plus, the oversized bore diameters accommodate up to 0.5mm overbore, giving you flexibility for future upgrades.
Key Features
- Sold as a set/pair for both single and dual AVCS fitment
- Die-cut multi-layer stainless steel (MLS) construction with a manufacturing tolerance of ±0.001"
- Folded stopper layer for enhanced combustion chamber sealing
- .25 micron Nitrile rubber layer reduces the risk of leaks on imperfect mating surfaces
- Accommodates up to 100.0mm bore
- Compatible with up to 13mm head studs for improved clamping force
- Available in thicknesses of 0.78mm, 1.1mm, and 1.5mm (after crushing)
Fitment
These gaskets are specifically designed for the following Subaru models:
- Subaru STI 2004-2007
- Subaru WRX 2008-2014
- Subaru Forester XT 2004-2008
Real-World Feedback
Subaru STI owners have reported significant improvements in sealing and reliability after installing the GrimmSpeed head gaskets. One owner noted, “I installed these gaskets during my rebuild, and they fit perfectly. No leaks, even under high boost!”
Another WRX owner mentioned, “The thickness options were a game-changer for my setup. I went with the 1.5mm for my high-compression build, and it’s performing flawlessly.”
With the GrimmSpeed EJ25 Head Gasket Sets, you're not just getting a part; you're investing in the longevity and performance of your Subaru. Upgrade with confidence and experience the difference that quality gaskets can make.
Other Part Numbers:
GrimmSpeed #GRM124000
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Make Vehicle | Model | Year |
---|---|---|
2004-2008 Subaru Forester XT |
Forester XT | 2004-2008 |
2004-2007 Subaru STI |
STI | 2004-2007 |
2008-2014 Subaru WRX |
WRX | 2008-2014 |
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.
If a GrimmSpeed-branded product covered by this warranty fails due to a manufacturing defect we will repair the product, without charge, or replace it, at our discretion. Only original, unaltered and unmodified materials and workmanship are covered by this policy and you must provide proof of original purchase to be fully covered. This warranty does not cover damage caused by accidents, improper care/installation, negligence, reasonable/normal wear and tear, or the natural breakdown of colors, coatings and materials over extended time and usage. GrimmSpeed cannot be held liable for any damage to your vehicle and/or its components caused by failures associated with the previous statement. Damage not covered under warranty may be considered for repair for a reasonable rate or a reduced price for a replacement piece (a fee will be charged for return shipping).This warranty is available in the United States and Canada.
This warranty does not cover products sold by GrimmSpeed that are not GrimmSpeed-branded products.
This warranty gives you specific legal rights; you may have other rights, which vary from state to state.
The GrimmSpeed website sells GrimmSpeed-branded discontinued, special make-up, and slightly blemished products at significant discounts as 'factory seconds' products. This warranty does not necessarily cover any products purchased as 'factory seconds'. The GrimmSpeed Warranty Department may repair 'factory seconds' products for a reasonable charge and a fee will be charged for return shipping.
Is normal wear and tear covered?
The GrimmSpeed Limited Lifetime Warranty covers manufacturing defects in materials and workmanship, but it does not cover normal wear and tear over extended time and usage. Wear and tear is damage that naturally and inevitably occurs as a result of normal use. Regardless of how carefully you use, or how well you care for your GrimmSpeed product, like all performance parts it will eventually begin to show age and wear. Common examples of wear and tear that would not be covered under the limited lifetime warranty include denting, abrasions or scratches, color changing from heat in exhaust components and so on, less common examples include flex-section wear and fatigue cracks over an extended period of time.
How do I send my product in for warranty?
The first step is to contact support@grimmspeed.com and let them know of your issues/concerns. From there, a customer service representative will personally work with you to determine the best path forward. For the quickest service, please include your contact information and photos of the failed product along with a copy of your receipt/invoice in your initial email.
Upon request from your customer service representative, your product must be returned directly to The GrimmSpeed Warranty Department at 650 Taft St NE, Suite 300, Minneapolis, MN, 55413. All shipping to Warranty must be pre-paid and insured. GrimmSpeed cannot be liable for lost in-bound packages.
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