GRIMMSPEED GRM018001 Phenolic Thermal Manifold Spacers Ej 3MM

( Brand: Grimmspeed ), ( Type: Intake Manifold Spacers ), ( Manufacturer Part Number: GRM018001 ), ( Material: Phenolic )

Review GRIMMSPEED Phenolic Thermal Manifold Spacers 3mm 02-14 Ej fits WRX STI 2004–2021

Introducing the Grimmspeed GRM018001 Phenolic Thermal Manifold Spacers, an essential upgrade for your 2002-2014 Subaru WRX and 2004-2021 Subaru STI with the EJ engine. These high-performance spacers are meticulously engineered to enhance the cooling system's efficiency and improve engine performance.

The Grimmspeed thermal manifold spacers are crafted from robust phenolic material, a superior choice for high-heat applications. Phenolic is known for its exceptional thermal conductivity, rigidity, and resistance to warping, making it an ideal material for this application. The spacers are designed to fit securely between the engine block and the thermostat housing, providing additional clearance and reducing the heat soak effect.

These spacers are specifically engineered for the Subaru EJ engine, ensuring a precise fit and optimal performance. The 3mm thickness provides enough clearance for larger aftermarket intercoolers and upgraded cooling systems, allowing for improved airflow and better engine cooling.

Installing the Grimmspeed thermal manifold spacers is a straightforward process, requiring no modification to the engine or cooling system. The spacers come with all necessary hardware for a hassle-free installation. Upgrading with these spacers not only enhances the cooling system's efficiency but also contributes to the overall durability and longevity of your Subaru's engine.

In summary, the Grimmspeed GRM018001 Phenolic Thermal Manifold Spacers are a must-have upgrade for Subaru WRX and STI owners with EJ engines. These spacers are meticulously crafted from high-quality phenolic material, providing superior thermal conductivity, rigidity, and resistance to warping. They offer increased clearance for larger aftermarket intercoolers and cooling systems, improving engine cooling and contributing to the engine's overall durability and longevity.

Grimmspeed GRM018001 Phenolic Thermal Manifold Spacers for Subaru WRX and STI (02-14 and 04-21): A Comprehensive Analysis

The Grimmspeed GRM018001 phenolic thermal manifold spacers are engine components designed to provide additional clearance between the turbocharger and the engine block in Subaru WRX and STI models from 2002 to 2014 and 2004 to 2021 with the EJ engine. These spacers are made of phenolic material, which is known for its heat insulation properties. In this analysis, we will discuss the potential advantages and disadvantages of installing these spacers in your Subaru.

1. Enhanced Clearance: The primary function of the Grimmspeed GRM018001 spacers is to provide additional clearance between the turbocharger and the engine block, which can help prevent contact between these components, especially during high-performance driving or when using larger aftermarket turbos.

2. Improved Heat Dissipation: Phenolic material is known for its excellent heat insulation properties. By using these spacers, the heat generated by the turbocharger is better insulated from the engine block, allowing the engine to maintain better cooling efficiency.

3. Simplified Installation: The Grimmspeed GRM018001 spacers are designed to be a simple and straightforward installation process, which can save time and money compared to other engine modifications.

1. Cost: While the Grimmspeed GRM018001 spacers may offer several advantages, they come at a cost. These spacers are not inexpensive, and potential buyers should consider whether the benefits outweigh the investment.

2. Limited Performance Gain: These spacers do not offer any significant performance gains on their own. Their primary function is to provide additional clearance and improve heat dissipation.

3. Potential for Vibration: Some users have reported experiencing increased engine vibration after installing these spacers. This issue may depend on individual engine configurations and driving styles.

The Grimmspeed GRM018001 phenolic thermal manifold spacers offer several advantages for Subaru WRX and STI owners, including enhanced clearance, improved heat dissipation, and simplified installation. However, they come at a cost and may not provide any significant performance gains. Additionally, some users have reported experiencing increased engine vibration. Ultimately, the decision to purchase these spacers depends on the individual's driving style, budget, and performance goals.

If you are a Subaru WRX or STI owner looking for additional clearance between your turbocharger and engine block, and you are willing to invest in a high-quality product, the Grimmspeed GRM018001 phenolic thermal manifold spacers may be a worthwhile investment. However, if you are on a tight budget or are not experiencing clearance issues, these spacers may not be the most cost-effective solution. It is recommended that you carefully consider the pros and cons before making a purchasing decision.

Details:

Fits EJ equipped 2002 14 Subaru WRX, 2004 21 STI. You can use original hardware with the 3mm spacers, just buy 2 sets of TV to cylinder head gaskets top and bottom spacers. I accidentally bought two thinking they came individually aha. Brand new set of genuine Grimmspeed 3mm phenolic intake spacers.

Still sealed in original package. This is just spacers, hardware or gaskets sold separately.

part #: grm018001 prices

• $36.00-$55.00

specifications inputmanifolds:

• for models: Wrx, Sti
• for years: 2004-2021
• brand: Grimmspeed
• type: Intake Manifold Spacers
• manufacturer part number: GRM018001
• material: Phenolic

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shipping inputmanifolds:

• cost: $10.45
• class: Standard
• transit: 5-9 Days
• type: Calculated
• carrier: USPS
• service: USPS Ground Advantage

returns inputmanifolds:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

seller inputmanifolds:

• city: Barrington, New Jersey
• rating: 99.2%
• # reviews: 1149

general inputmanifolds:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Intake Manifolds

offer inputmanifolds:

• sold: 0
• options: Ship-to-home
• started: November 27, 2025
• quantity: 1
• availability: In Stock