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GrimmSpeed 3mm Subaru WRX STI Phenolic Thermal Spacer
Do you know what your intake manifold sits on?...a superheated boxer engine. If you don't know already, the cooler your intake air is the more HP your car will achieve. We present you the answer to this age old problem, raising the intake manifold off the engine with GrimmSpeed's Phenolic Intake Manifold/TGV to Engine Thermal Spacer. 

Phenolic spacers have been used for years by many other specialized automotive companies, but this is new technology to the Subaru world.

What it does:

  • Greatly reduces the transfer of heat from engine to intake manifold thus reducing heat soak.
  • One-of-a-kind true Phenolic material, not cutting board material like others.
  • The cooler your intake temperature is, the denser the air is which leads to more power.
  • For every 5 degree reduction in air temperature, increases power by 1%.
  • Cooler and denser intake air, increases the amount of air that can be mixed with fuel thus increasing efficiency.
    GrimmSpeed 3mm Subaru WRX STI Phenolic Thermal Spacer
  • Direct bolt-on.
  • When running a gasket only, your intake manifold gets very hot to the touch, enough to burn your hand. When our gaskets are paired with our Phenolic Spacers, your hand can be placed on the intake manifold without any issues.
  • We do recommend using 2 sets of our gaskets, one on both sides of the spacers.
  • USA MADE.

How it works:

  • The intake air in your engine travels through the airbox into the turbo, then into the aluminum intake manifold. The air exits the intake manifold and goes directly into the engine.
    GrimmSpeed 3mm Subaru WRX STI Phenolic Thermal Spacer
  • While the intake air is within the intake manifold it picks up a lot of heat from the aluminum intake manifold. This added heat reduces air density thus reducing engine power capabilities.
  • In stock form your engine has a steel gasket between the intake manifold and engine which allows the heat from the engine to quickly transfer into the intake manifold. By replacing this steel gasket with the GrimmSpeed Phenolic Spacer and gaskets you are greatly reducing the transfer of engine heat into the intake manifold.
  • Phenolic Spacers are able to withstand 500+ degrees F. Subaru engines run at the hotter end of operation around 200 degrees F, so the Phenolic Spacer is well within its max running temperature. GrimmSpeed has tested that it is also safe to run race fuel, E85 and methanol with the Phenolic Spacers.
  • The Phenolic Spacer will conduct 300-900 times less heat than the oem steel gasket.

Temperature Testing Data: Testing at 1/2 hour intervals. All testing was conducted fairly in Fahrenheit measurements on ONE day at a consistent outside temperature.

Test #1 - OEM measurement from IM without spacers, 152 degrees.

Test #2 - with 3mm phenolic spacers the temp dropped to 134 Degrees

Test #3 - With 8mm phenolic spacers the temp dropped to an outstanding 108 Degrees!!!

That is an OVER 44 Degree drop with the largest Phenolic Spacers!

Applications:
WRX '02-'14
STI '02-'20
Legacy GT 02-'09
Forester XT '02-'13

Returns
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange. Please send an email to sales@jdmuscleusa.com or use our return portal located at the top of the page to set up a return.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Additional non-returnable items:

    • Giftcards
    • Special-ordered items, including anything custom products

 

If you choose to email us to initiate a return, please ensure to include the following information in your email:

    • Your order number
    • Item(s) that you wish to return
    • Reason for returning

 

Please do NOT send your purchase back to the manufacturer

Please do NOT send back an item without setting up a return first

Depending on your method of payment, transaction fees might not be refundable which ranges between 2.3% - 6% of the order value. Note this is charged by a third-party payment provider, not us. You may receive a full refund if you choose to receive a store credit instead.

There are certain situations where only partial refunds are granted (if applicable)

    • Any item not in its original condition/ is damaged or missing parts for reasons not due to our error
    • Any item that is returned more than 30 days after delivery

 

Some manufacturers would charge a restocking fee ranging from 10% - 30% of the original order value. Below is a list of some but now all of them, please be mindful when placing the order / considering a return:

    • ESR 30%
    • JDMuscle 15%
    • PLM 20%

 

Cancellation

Please ensure you have contacted us on availability before placing an order. All cancellations could be subject to 2.3% - 6% fee to cover transaction costs charged by third-party payment providers. You have 7 days to cancel an order, once the order has been processed(item packaged/ tracking number has been created), the cancellation will not be allowed but you may contact us for a return request if the item is eligible for return.

Special-ordered items cannot be canceled.


Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 3-10 business days(depending on the payment provider). The restocking fee might be applicable as noted in the return section.

Late or missing refunds (if applicable)

Once you have received an email/text from us stating the refund has been processed, at this stage, it's completely out of our control but depends on the payment providers to decide when the refund will show up in your bank. As noted, depending on the payment provider the process can take up to 10 business days(usually 3-5). If you haven’t received a refund yet, please first check your bank statement. A lot of times instead of a new line showing a reversal charge/credit, the payment would just disappear from your pending section.


Contact your credit card company/financing company you used, it may take some time before your refund is officially posted but reaching out might help expedite the process.

If you’ve done all of the above and you still have not received your refund yet, please contact us at sales@JDMuscleUSA.com and one of our team members will provide assistance.

Sale items (if applicable)
Only full-priced items are eligible for return/refund.


Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at sales@JDMuscleUSA.com or use the return/exchange portal located on the top of the page.

Gifts
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be emailed to you.

If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.

Shipping
You will be responsible for paying for your own shipping costs for returning your item unless the item was damaged/wrong/defective in which case we will cover shipping both ways. Initial shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item and take no responsibility for any loss or damage during the return shipping.

And please refer to the return shipping address as provided in the RMA / return instructions. A lot of times the return address can be different than the initial shipping address.

Returns
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange. Please send an email to sales@jdmuscleusa.com or use our return portal located at the top of the page to set up a return.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Additional non-returnable items:

  • Giftcards
  • Special-ordered items, including anything custom products

 

If you choose to email us to initiate a return, please ensure to include the following information in your email:

  • Your order number
  • Item(s) that you wish to return
  • Reason for returning

 

Please do NOT send your purchase back to the manufacturer

Please do NOT send back an item without setting up a return first

Depending on your method of payment, transaction fees might not be refundable which ranges between 2.3% - 6% of the order value. Note this is charged by a third-party payment provider, not us. You may receive a full refund if you choose to receive a store credit instead.

There are certain situations where only partial refunds are granted (if applicable)

  • Any item not in its original condition/ is damaged or missing parts for reasons not due to our error
  • Any item that is returned more than 30 days after delivery

 Some manufacturers would charge a restocking fee ranging from 10% - 30% of the original order value. Below is a list of some but now all of them, please be mindful when placing the order / considering a return:

  • ESR 30%
  • JDMuscle 15%
  • PLM 20%

 

Cancellation

Please ensure you have contacted us on availability before placing an order. All cancellations could be subject to 2.3% - 6% fee to cover transaction costs charged by third-party payment providers. You have 7 days to cancel an order, once the order has been processed(item packaged/ tracking number has been created), the cancellation will not be allowed but you may contact us for a return request if the item is eligible for return.

Special-ordered items cannot be canceled.


Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 3-10 business days(depending on the payment provider). The restocking fee might be applicable as noted in the return section.

Late or missing refunds (if applicable)

Once you have received an email/text from us stating the refund has been processed, at this stage, it's completely out of our control but depends on the payment providers to decide when the refund will show up in your bank. As noted, depending on the payment provider the process can take up to 10 business days(usually 3-5). If you haven’t received a refund yet, please first check your bank statement. A lot of times instead of a new line showing a reversal charge/credit, the payment would just disappear from your pending section.


Contact your credit card company/financing company you used, it may take some time before your refund is officially posted but reaching out might help expedite the process.

If you’ve done all of the above and you still have not received your refund yet, please contact us at sales@JDMuscleUSA.com and one of our team members will provide assistance.

Sale items (if applicable)
Only full-priced items are eligible for return/refund.


Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at sales@JDMuscleUSA.com or use the return/exchange portal located on the top of the page.

Gifts
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be emailed to you.

If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.

Shipping
You will be responsible for paying for your own shipping costs for returning your item unless the item was damaged/wrong/defective in which case we will cover shipping both ways. Initial shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item and take no responsibility for any loss or damage during the return shipping.

And please refer to the return shipping address as provided in the RMA / return instructions. A lot of times the return address can be different than the initial shipping address.

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov

GrimmSpeed 3mm Phenolic Thermal Spacer WRX/STI/FXT/LGT

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