JDMuscle YDYBB Unequal Length Header - MT&CVT

• 2022-2026 Subaru WRX

Introducing the JDMuscle 22+ WRX YDYBB Unequal Length Header – the ultimate performance upgrade for your Subaru WRX. Crafted with precision using high-quality SS304 stainless steel construction, this header is designed to optimize exhaust flow and unleash the full potential of your vehicle. You Do You Boo Boo! If you are not about full performance and have been craving that iconic rumble sound from your childhood memories, look no further! 

Quick Specs

• SS304 construction
• Instant hp gain and increased torque with custom tuning
• Iconic rich and deep rumble sound
• The undertray vent will need to be removed for clearance due to limited room(see 7:30 of the video TMG posted for reference)
• Gaskets included!
• These headers can be installed without the need for a tune.
• Headers are able to be installed with the stock exhaust!
• Per our testing single scroll will perform better on the higher end hp while twin scroll's torque comes in a tat sooner

When paired with custom tuning, you can expect an instant horsepower gain and increased torque, taking your driving experience to a whole new level. Feel the power surge as you accelerate, and enjoy the thrilling sensation of boosted performance on the road or track.

As a cherry on top, this unequal length header delivers an iconic rich and deep rumble sound, adding a distinctive character to your WRX that will turn heads wherever you go. Embrace the growl that matches the beast under the hood and experience the symphony of power and style.

Upgrade your WRX with the JDMuscle 22+ WRX YDYBB Unequal Length Header and unlock the true potential of your vehicle, whether you're a performance enthusiast or simply looking to enhance your daily driving experience. Get ready to dominate the streets and leave a lasting impression with this high-performance upgrade. 

 

 

Comments from Anthony / Dmann Tuning who performed testing:

"Okay, for initial testing of the JDMuscle prototype we used a FBO 22 WRX on E50. The vehicle was loaded with our “standard” E50 ProTunes. The vehicle had an ETS Intake, GESi J-Pipe, ETS FMIC and a Cobb catback before installation of the header and with no other changes. No kill maps were use and this tune we used is something we would generally have as a completed tune on a customer vehicle for sake of comparison to apples to apples. The vehicle made 407/436 at the tire twice on both baseline runs. After the addition of the JDMuscle UEL header; the car produced 417/413 at the wheels. (You can see below in the pull data it was done the same day within 3 hours apart with similar weather conditions) The obvious and expected loss of low-end moving from an EL/twin scroll to a single scroll/UEL design was actually less than anticipated. I will comment on the fact the vehicle did make more power up top with no tune changes as a result of the larger manifold sizing.

After some simple tuning modifications mainly to the WG initial table to smooth back out the boost onset and attempt to bring it in sooner and adding another .5psi down low (no timing changes) netted a whopping 418/468 at the tire and mitigated the low end loss to a minimum. To be fair, with the stock manifold, the tq increase if the same tune was placed on the car would total net about the same. Concentrate more on whp above the curve and mitigation of the low-end loss. As we all know, there will always be a loss from going from a twin-scroll EL, to a single UEL. This fact is irrefutable. However, the 2.4s extra displacement and redesigned turbo (E-WG) loses are much less than the “expected loss” when compared to a FA20 with a Tomei UEL for example. Also note, the chart looks exaggerated due to the nature of the auto-scaling.

Dmann’s take: If you’re a UEL fan and you’re going to do it regardless; well, at least this one makes a touch more power. Furthermore, with some additional clever tuning, the TQ loss can almost be completely mitigated to the point of “almost” being negligible. To be honest, I can not tell a discernible difference with transient boost affects when driving the vehicle on the road and can feel a positive power increase overall.

Disclaimer: The negative effects of going UEL are still unknown since the last gen. /DMann Tuning"

["JDMuscle 1-Year Warranty & Lifetime Support"]X

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, imperfections or missing components, report them immediately to sales@jdmuscleusa.com. Do not install the item. Please note that reports of damage, defects, imperfections or missing components after installation will NOT be honored.

Package Protection

We do our best to ensure your items arrive to you safely but sometimes things happen. If you utilized our Checkout+ feature, rest assured that your package is protected! With package protection, in the event that your package is lost, stolen, or damaged while in transit, we will replace it free of charge. To start a shipping claim, please click here.

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.

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%

PLM & Option Lab 20%

 

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.

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