GrimmSpeed Cold Air Intake - Black Subaru WRX 2002-2007 / STI 2004-2007 / Forester XT 2004-2008 | 060074

It"s no secret that GrimmSpeed intakes feature performance and aesthetics that lead the pack. With years of design theories and knowledge gained from our successful intake program, we have developed solutions that increase power and are very easy to install and tune.The only thing we were missing was an intake system for early Subaru models, and after nearly two years of development and testing we are extremely proud to offer what we feel is the best intake for the 2002-2007 Subaru WRX and STI, and 2004-2008 Subaru Forester XT.

Quick Specs

• Hybrid Cold Air/Short Ram Design- Combining the advantages and eliminating the negatives of both traditional intake designs
• Air Straightener"A key component for accurate and consistent MAF sensor readings
• Custom Reusable High Flow Air Filter-Integrated velocity stack entrance smooths incoming air
• Stealthbox Heatshield "Our signature heatshield design which provides cool air while hiding ugly components
• Made in the USA- Right here in Minnesota, in fact

• 40 min Installation - Extremely simple with our written and video guides

Design

Our design requirements for this intake are similar to our others: the intake should reduce as much restriction as possible, it should be easy to tune and accurately measure incoming airflow, it should properly filter out potentially harmful particles, and it should look like something you’re proud to have in your engine bay.

We designed this intake to meet these goals by using only minimal bend angle and pipe length which helps to decrease restriction.  Additionally, our low restriction washable air filter helps here too, while still filtering particles down to 5 microns.  We have also incorporated an air straightener into our design, an invaluable feature that was not utilized on the OEM airbox until later models.  Finally, we have continued our “StealthBox” heatshield design, utilizing it to not only keep hot air away from the air filter, but to cover up unsightly components such as the ABS pump.

Less obvious features of this intake include the location of the air filter.  Specifically that we made sure that the filter is not close enough to the ground such that water/hydrolocking is a concern.  The heatshield also contains provisions to mount the factory clips that hold the two coolant hoses that would traditionally mount to the OEM airbox. This keeps them out of the way and maintains a clean aesthetic.  The design of the heatshield also acts to hide the power steering pump reservoir, but does not hinder inspection or filling.  Overall what is accomplished is a true hybrid of traditional Cold Air Intakes and Short Ram Intakes, with all the advantages and none of the compromises.

This engineering study from our 08-14 design above illustrates the importance of understanding how air moves within the entire intake system. The figure shows how the GrimmSpeed intake design compares to other intake designs with respect to MAF placement and how that affects airflow readings. Since the MAF sensor samples the velocity of incoming air to measure flow in the center of the tube, having an accurate velocity profile at the sensor is the only way to accurately measure airflow.  Even though the diameter of our intake is the same as the OEM airbox that alone does not guarantee accurate readings.  The position and clocking of the MAF with respect to the entire system is also very important.  All of these seemingly small details end up being extremely important to how the intake affects how the incoming air is measured by the ECU.

Materials

In true GrimmSpeed fashion, no corners were cut in the fabrication of each and every one of these intakes. The aluminum heat shield is laser cut, CNC bent and riveted together before receiving a heavy duty black texture powdercoat. MAF flanges are CNC machined from 6061 aluminum and the intake tube is fabricated from 5052 aluminum and CNC bent.  The air straightener is laser cut from 6061 aluminum as well, and tumbled before the entire assembly is TIG welded by our expert welders. After welding, each tube receives our heavy duty wrinkle powdercoat and is inspected and cleaned to ensure maximum performance and reliability. 

Performance and Tuning

At GrimmSpeed we love tuners and we like to make sure they love us back. Our intakes are notoriously easy to tune, and this one is no different.  The consistency of the airflow through the MAF sensor makes this intake very predictable and is as easy to tune as the stock airbox. While pro-tuning is always recommended, the Cobb OTS AccessPort Maps can sometimes provide a safe temporary alternative based on your vehicle and level of modification.  

Dyno testing was completed on a 2006 WRX, equipped with a GrimmSpeed 3-Port EBCS, Catted Downpipe, EWG Up Pipe and TMIC, being force fed by a VF39 on 91 octane.

We used a testing methodology to show a difference between how a change to only the intake affects the power output, boost, and air to fuel ratios.  The car was first equipped with a Cobb OTS Stage 2 tune and was modified only for the VF39 and external wastegate.  The airbox was OEM, but with a K&N drop in filter.  The tune was then verified and ran multiple times for a boost target of 18psi and an AFR of 11:1.  Next, we installed the GrimmSpeed intake and performed a dyno pull.  As expected, the tune was a little too rich, so the tuner adjusted fueling to compensate.  The goal was to make the exact same AFR as our OEM airbox pulls, and the tuner accomplished this in only three total pulls on the dyno.

The result of this pull, with absolutely no changes to the map other than adjustments to match AFR, was an increase in horsepower and torque nearly everywhere in the entire RPM range.  There are maximum gains of over 13 ftlbs and 18 hp, as shown in the chart to the left.  The chart on the right demonstrates that the design of the GrimmSpeed intake system has decreased restriction over the stock system (even with an aftermarket drop in filter).  This chart shows that while the AFRs for the pull are exactly the same, the gains in peak boost have increased by almost .75psi.  Even more important is the increased boost at redline of 1.5psi.  An increase in boost from only the intake change means that it has removed that much restriction from the intake system.  Just looking at the boost curve shows that these relatively small turbos start to run out of breath at higher RPMs, and that the much needed increase in boost that the GrimmSpeed intake creates results in a substantial power gain all the way to redline.

Included Components

• 1x Intake Tube
• 1x High-flow Oiled Filter
• 1x Silicone Hose Coupler
• 1x Heat Shield Assembly
• 3x Hose Clamps
• 2x MAF Flange Screws
• 3x Precut Rubber Sealing Strip
• 3x Airbox to Chassis Bolts

Fitments

• 2002-2007 Subaru WRX
• 2004-2007 Subaru STI
• 2004-2008 Subaru Forester XT

Due to the Chinese New Year, the following brands may or may not be impacted and experiencing delays till 2/9/2022 for the shipments that's coming from Asian Area directly: BC Racing Idoing JDMuscle RES Reshingu Rexpeed Yellow Speed Racing

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.

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