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GrimmSpeed 1.1mm EJ25B DAVCS Head Gasket Set
$146.00

GrimmSpeed EJ25 Head Gasket Sets

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.

Why Choose GrimmSpeed?

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.

Designed for Performance

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.

Enhanced Features

  • Sold as a Set/Pair - Compatible with Single and Dual AVCS fitment
  • Die Cut Multi-Layer Stainless Steel (MLS) Construction - Ensures a smooth edge finish with a manufacturing tolerance of ±0.001"
  • Folded Stopper Layer for superior combustion chamber sealing
  • 0.25-micron Nitrile Rubber Layer Coating - Reduces chances of leaking on imperfectly smooth mating surfaces
  • Accommodates up to 100.0mm bore
  • Compatible with head studs up to 13mm (1/2")
  • Available thicknesses: 0.78mm, 1.1mm, and 1.5mm (after crushing)

Fitment

  • Subaru STI 2008-2020

Customer Feedback

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

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WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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Who is Grimmspeed?

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 Offering

The 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 Development

Grimmspeed 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 Racing

Built 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.






 




What is the GrimmSpeed Limited Lifetime Warranty Policy?GrimmSpeed-branded products are warrantied to the original owner against manufacturing defects in materials and workmanship for the lifetime of the product.

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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Sale price None
Wholesale price $137.82
Shipping Weight: 0.90
Length: 14
Width: 8
Height: 1
Product Added At Wednesday 10 August, 2022
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By vendordata@vividracing.com
View In Admin

Emissions Info
Carb Approved Yes
Carb Number -
Epa Status N/A
Prop65 Unknown
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber MAP Core Updated
Premier WD $116.80 $146.00 $146.00 $146.00 ? 2025-07-11 15:01:45


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