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Bull Boost Performance

Catted Race Stainless 300 Cell Downpipe for Mercedes Benz AMG GT63 GT63S 4.0T

Catted Race Stainless 300 Cell Downpipe for Mercedes Benz AMG GT63 GT63S 4.0T

Regular price $1,749.91 USD
Regular price Sale price $1,749.91 USD
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Shipping calculated at checkout.

Upgrade exhaust flow while retaining catalytic function on your Mercedes Benz AMG GT63 or GT63S X290 4.0T with the STRATEC High Flow 300 Cell Catted T304 Stainless Downpipe, engineered for stronger performance gains and refined race sound.

Constructed from premium T304 stainless steel, this downpipe features a 300 cell high‑flow catalytic converter designed to significantly reduce backpressure compared to the factory unit while maintaining emissions hardware. The result is faster turbo response, improved mid‑range power, and a sharper AMG exhaust character.

Designed as a direct bolt‑on upgrade, this downpipe installs to factory mounting points for clean fitment and reliable sealing.


Performance Benefits

  • 300 cell high flow catalytic converter

  • Reduced backpressure for quicker turbo spool

  • Stronger mid‑range and top‑end performance

  • Mandrel bent T304 stainless tubing

  • Precision TIG welded construction

  • Direct bolt on installation


Fitment

Mercedes Benz AMG GT63 X290
Mercedes Benz AMG GT63S X290
4.0T Twin Turbo V8

Shipping & Returns

Shipping on most orders in 24-48 hours special orders can be 2-3 days. Returns see Returns Policy.

We have a 30-day return policy on most products, which means you have 30 days after receiving your item to request a return. Some products carry a longer manufacture warranty please contact us if you have questions about items.

To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at overthehilltractor@gmail.com. Please note that returns will need to be sent to the following address: 2005 Stuarts Draft Hwy, Stuarts Draft, VA 24477

If your return is accepted at damage or defective, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

If your return is due to no longer needed, wrong size order, ordered by mistake, found better pricing, etc the customer is responsible for the return shipping cost.

Any item returned over $50 cost we suggest insurance on package.

You can always contact us for any return question at overthehilltractor@gmail.com.

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, we can only give 72 hours from time package is scanned delivered to accept claims. Please contact within 72 hours of delivery so that we can evaluate the issue and make it right.

Exceptions / non-returnable items
Certain types of items cannot be returned, like fuel related items due to hazardous materials shipping regulations. We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Electrical parts can only be returned if new and in original condition, Used electrical parts are not returnable unless actually defective, contact us with details.

Unfortunately, we cannot accept returns on sale items or gift cards.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at overthehilltractor@gmail.com.

Most items are covered by 30 day warranty, Fuel Related parts are only covered against actually manufacture defect since the fuel produced today breaks down gaskets and seals quickly. Electrical parts can only be returned if new and in original condition, Used electrical parts are not returnable unless actually defective, contact us with details. Returns are handled on each individual item, some items will not require return for refund just that customer submit picture of proof of issue. Please contact us with questions about returns.

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  • Free Shipping

    Free shipping on orders over $150

  • Returns

    See Returns Policy Page

    Returns Policy