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!