APR Carbon Fiber Rear Diffuser - WRX STi 2004-2007

Diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because a car displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air.

To help channel the high speed air flow coming from underneath the car, diffusers redirects the high speed air flow to transition smoothly transition into the low pressure vacuum in the rear. This encourages a smoother flowing air flow underneath the car and allows better performance from other aerodynamic components such as aerodynamic wings.
Pre-preg. Carbon Fiber Manufacturing Process

Shipping Policy

At JDMuscle, we understand that fast and reliable shipping is crucial. With multiple distribution centers across the nation, most in-stock items are shipped within 1-2 business days. On average, you can expect delivery within 1-5 business days for in-stock items. Please note, however, that some products may ship directly from vendors, which could result in additional delays. Products sourced from overseas may also take longer to arrive.

Free Shipping over $199 Policy

Free shipping is available only for the 48 contiguous states in the U.S.

Ground shipping applies to regular-sized items only.

Oversized items such as lips, hoods, and trunks requiring freight shipping are not included in the free shipping program.

Some manufacturers may impose a shipping surcharge, which will be excluded from the free shipping program.

The most accurate shipping costs will be displayed at checkout. If you believe the shipping cost is incorrect, please contact us at sales@jdmuscleusa.com for further review.

Carriers

We ship via FedEx, UPS, USPS, and DHL. While we strive to use the most efficient option, we cannot guarantee which carrier will deliver your order. Your items may arrive in multiple packages through different carriers.

Processing Time and Shipping Cut-off

Orders typically take 24 hours to process, with shipping cut-off at 3:00 PM EST. Transit times vary based on location and carrier. Some items, especially those requiring freight shipping, may have extended processing and delivery times. For freight shipping inquiries, contact us at sales@jdmuscleusa.com.

International and Special Shipping Considerations

International orders are subject to higher shipping fees. If you would like to review your shipping cost, email us at sales@jdmuscleusa.com with your full address and items you plan to purchase.

In some cases, shipping costs may be incorrectly calculated for international or oversized items. We reserve the right to adjust the shipping fee and will work with you to negotiate a fair cost if needed.

Customers can challenge and request a review of international shipping fees, and we’ll do our best to find a lower rate where possible.

Customs Fees & Import Taxes: The shipping charge you pay does not include customs fees or import taxes. These charges vary by country and are the customer’s responsibility. Please check with your local customs office for more details before placing an order.

Shipping Cost Adjustments: Shipping rates fluctuate, and while we strive to provide the most competitive rates, there may be instances where the shipping cost you paid is significantly lower than the actual cost. In such cases, we reserve the right to request the difference to ensure we cover our basic expenses. We appreciate your understanding and will always aim to keep shipping costs as affordable as possible.

Address Modifications and Fees

Any modifications to a shipping address after an order is placed may be subject to additional fees.

For single, small packages, the flat fee is $20. For larger or multiple packages, the fee may be up to $60 or more.

Freight Shipping Guidelines

Freight shipments require you to be present at the time of delivery.

The delivery driver may provide a delivery receipt (Bill of Lading). It is crucial to inspect the shipment before signing.

Carefully check the packaging for any visible damage (dents, punctures, rips) and notate it on the Bill of Lading.

Open the package and inspect the product itself. If damage is found, document it in detail on the Bill of Lading, take photos, and contact the shipping company to initiate a damage claim.

Do not refuse the shipment. Contact us at sales@jdmuscleusa.com for guidance.

If the delivery driver is unable to wait for inspection, note this on the Bill of Lading.

Failure to document damages before signing the Bill of Lading will void any claims for refunds or replacements.

Pre-Installation Inspection Policy

We strongly recommend inspecting all parts or items upon arrival before installation. If you identify any damage or imperfections, report them immediately to sales@jdmuscleusa.com. Do not install the item. Please note that reports of damage, defects, or imperfections after installation will not be honored.

Need Assistance?

If you have any concerns about shipping costs or transit times, or if you notice discrepancies during checkout, feel free to reach out to us at sales@jdmuscleusa.com. We’re happy to assist you and ensure a smooth delivery experience.

JDMuscle LIFETIME LIMITED WARRANTY POLICY

All the non-JDMuscle Branded Products will have the warranty provided by the MFG which varies. We do offer lifetime techinical support for any product related questions.

For JDMuscle/Racing Art Products:

Effective for any JDMuscle product purchased on or after 2024/01/01

JDMuscle warrants its products under this Lifetime Limited Warranty Policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) JDMuscle products purchased directly from JDMuscle or authorized dealers, and (ii) the original purchaser of such JDMuscle products (“Purchaser”). This Warranty Policy is non-transferable, and all claims must be accompanied by the original sales receipt. JDMuscle reserves the right to change the terms and conditions of this Warranty Policy at any time without notice.

Warranty Coverage

Under the terms of this Warranty Policy, if it is determined that a JDMuscle product was not manufactured to advertised specifications, JDMuscle will, at its discretion: (i) repair or replace the original product; (ii) replace the original product with the most current available model if the original is no longer available; or (iii) provide a gift card redeemable at jdmuscleusa.com for the amount of the original purchase price of the product.

This Warranty Policy also covers Racing Art products.

For non-JDMuscle branded products purchased through JDMuscle, we offer lifetime technical support in addition to the manufacturer’s warranty.

Lighting and Carbon Fiber Warranty Periods

• Lighting Products: Covered for 2 years from the date of purchase.
• Carbon Fiber Products: Covered for 15 months from the date of purchase.

Submitting a Claim

To submit a warranty claim, the Purchaser must:

• Email sales@jdmuscleusa.com with the claim details.
• Provide the original sales receipt or an authorized dealer order number.
• Include a photo of the product clearly showing the issue.
• If requested, the Purchaser must send the product, with all transportation costs prepaid, to JDMuscle.

Special Conditions for Carbon Fiber Products

• Carbon fiber products must be clear-coated by the customer upon receipt to maintain durability.
• This Warranty Policy covers only cracking caused by the product itself and not due to any impact, neglect, improper care, or use.
• Normal wear and tear, including minor scratches or fading, is not covered under this policy.
• Carbon fiber hoods must be installed with hood pins for safety. JDMuscle will not cover damage resulting from failure to use hood pins.

Warranty Exclusions

This Warranty Policy does not cover:

• Damage due to accidents, neglect, improper installation, or usage.
• Normal wear and tear, including stains, scratches, or other minor cosmetic issues.
• Issues arising from non-compliance with care, use, and installation instructions.
• Any damage to carbon fiber products not related to structural cracking.
• Labor costs for installation or removal of products.
• JDMuscle is not responsible for any other property damage or personal injury related to the use or installation of its products.

General Warranty Guidelines

• All claims must be accompanied by a photo of the product showing the issue.
• Products damaged on arrival (DOA) must be claimed within 7 business days of delivery. Claims outside of this timeframe will not be covered under the lifetime warranty.
• JDMuscle reserves the right to refuse any claim at its discretion.
• Approved claims may result in repair, replacement, or a gift card equivalent to the original purchase price, at JDMuscle’s discretion.
• If a replacement product is out of stock, the customer will be placed on backorder until the product becomes available.
• All historical orders are covered under this Warranty Policy.

Shipping Guidelines

Repaired or replacement products will be shipped to the Purchaser within the continental United States via standard ground service. Expedited shipping and international shipping are available at an additional cost.

Shipping Costs

Shipping fees for repairs or replacements will vary based on the claim as follows:

• Standard Products (non-oversized): $25 if submitted within 90 days, $40 after 90 days.
• Oversized Items (e.g., hoods, large aero parts): $180 if submitted within 90 days, $250 after 90 days.
• Accessories: $15 if submitted within 90 days, $25 after 90 days.
• For claims submitted more than two years after the purchase date, an additional $20 surcharge will apply.

General Disclaimer

THE WARRANTIES SET FORTH HEREIN ARE THE ONLY WARRANTIES MADE BY JDMUSCLE WITH RESPECT TO ITS PRODUCTS. JDMUSCLE DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. THE PURCHASER ASSUMES ALL RISKS RELATED TO THE USE OF JDMUSCLE PRODUCTS.

Limitation of Liability

No claim by the Purchaser shall exceed the purchase price of the product. JDMUSCLE SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR BUSINESS OPPORTUNITIES, ARISING FROM THE USE OR INABILITY TO USE JDMUSCLE PRODUCTS.

For further information or assistance, please contact our customer support.

Our policy lasts 30 days. If 30 days have passed since your purchase, unfortunately, we can’t offer you a refund or exchange. To initiate a return, please email us at sales@jdmuscleusa.com.

Eligibility for Returns

✅ Items must be unused and in the same condition as when received.
✅ Items must be in their original packaging.

Non-Returnable Items

❌ Gift cards
❌ Special-order or custom products

How to Initiate a Return

📧 Include the following details in your return request email:

Order Number

Item(s) to be returned

Reason for return

Important Notes:

Do NOT send your purchase back to the manufacturer.

Do NOT return any items without first setting up a return request with us.

Partial Refunds

Partial refunds may be granted under the following conditions:

⚠️ Items not in original condition, damaged, or missing parts not due to our error.
⚠️ Items returned more than 30 days after delivery.

Restocking Fees

Some manufacturers may charge a restocking fee, which includes but not limited to:

ManufacturerRestocking Fee

ESR30%

JDMuscle15%

PLM20%

Cancellations

Before placing an order, please confirm availability.

Cancellations within 7 days may be subject to fees to cover third-party transaction costs.

Once the order has been processed (packaged or tracking generated), cancellations are not allowed. Eligible items may be returned instead.

Special-order items cannot be canceled.

Refund Process

🔄 Once your return is received and inspected, we will notify you of the refund status.
💳 Approved refunds will be credited back to your original payment method within 3-10 business days (depending on the payment provider).

Late or Missing Refunds

🔍 Check your bank statement — sometimes the refund may not appear as a new entry but as the disappearance of the pending charge. 📞 Contact your credit card or financing company — they may require additional time for processing.

If you’ve done all of the above and still haven’t received your refund, email us at sales@jdmuscleusa.com for assistance.

Sale Items

Only full-priced items are eligible for returns and refunds.

Exchanges

We replace items only if they are defective or damaged. To request an exchange for the same item, email us at sales@jdmuscleusa.com.

Gifts

🎁 If the item was marked as a gift when purchased and shipped directly to you, you will receive a gift credit for the return value.
📩 If the gift giver had the item shipped to themselves, we will refund the gift giver.

Return Shipping

📦 Customers are responsible for return shipping costs unless the item is damaged, defective, or incorrect (in which case we will cover shipping both ways).

Initial shipping costs are non-refundable.

Return shipping costs will be deducted from the refund amount.

For items over $75, consider using a trackable shipping service or purchasing shipping insurance. We are not responsible for lost or damaged items during return shipping.

Return Shipping Address: Please use the address provided in the RMA/return instructions, as it may differ from the initial shipping address.

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