2007-2013 Mazdaspeed 3 51r Battery Box

Corksport SKU: AXL-6-602-10
2007-2013 Mazdaspeed 3 51r Battery Box

2007-2013 Mazdaspeed 3 51r Battery Box

Corksport SKU: AXL-6-602-10
Regular price $199.99 USD

This item is sold out in Winnipeg. However, may be in stock at one of our warehouses! Email us to get an ETA! sales@ossmotorsport.com

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CorkSport is proud to offer the first complete solution for your (up to) 4” intake, 51R battery, and ECU all in one clean enclosed package. Don’t settle for an engine bay full of loose wires, unprotected battery terminals and increased chance for corrosion. The CorkSport 51R ECU Relocation Box provides a clean setup relocating your ECU inside the box while providing ample clearance for your 51R battery and (up to) 4” intake. Manufactured from ABS plastic for an OEM fit, finish, and durability. #ZoomZoom!

Check out the installation instructions below. Share your performance review with the CorkSport community once installed!

The CorkSport Advantage


Performance Advantage

Designed to work with up to 4" intake systems, the 51r ECU Relocation Box provides approximately an extra 0.75" of clearance (compared to the full size CorkSport Battery box) without sacrificing fit and finish.

The ECU is relocated to the driver's side of the battery box with the wiring harness routed inside the box for a clean and purposeful look. The single lid design provides easy and ample access to the battery and ECU.

Mazdaspeed 3 51r battery kit

Fit & Finish

The 51r ECU Relocation Box is designed to use the OE mounting points for an easy installation with very little modification required to the wiring harness. The internal dimensions are designed around the industry standard 51r battery to fit all brands.

Speed3 upgraded battery box for 3 inch intakes

Materials & Manufacturing

CAD designed and manufactured from durable ABS plastic, the CorkSport 51r ECU Relocation box fits great and will stand up to the test of time. Battery restraint is completed with M6 studs and a 0.120" thick anodized aluminum plate.

Additional Features

    • Compatible with: 2007-2013 Mazdaspeed 3
    • Designed in America: Designed in Vancouver, Washington, in the Pacific Northwest.
    • CorkSport Service & Support: 2 year limited warranty, full color installation instructions, all necessary components, and knowledgeable telephone support at (360) 260-2675.

How To Install Your CorkSport 51r Battery Box

It will take you two hours to install the CorkSport 51r Battery Box with our easy-to-use instructions.


1 Hour Install Time

1 Hour Install Time

Difficulty: 2/5

2/5 Difficulty

2-Year Warranty

2-Year Warranty



Tracking will be sent once it leaves our warehouse.

For Canadian shipments, if the item is at a US address, the item needs to be brought into our Winnipeg warranty prior to shipping out to the destination.

Tracking information will be received once it leaves Winnipeg.

Please note, average turn around time for this is roughly 2 weeks, if the product is in stock.

Absolutely NO refunds/exchanges on special order items. If return of a non special order item is requested, customer must pay shipping and it must be requested within 14 days of purchase. 

Any orders not picked up by the customer within 15 days after notification of arrival becomes property of OSS Motorsport Ltd. no credit or refund will be given.

Customers that remove product(s) from OSS Motorsport will have been deemed to agree with all of the above terms and conditions. All items sold are for Off Road Use Only.

All performance modifications are done at your own risk and may void your warranty.


Unwanted items are subject to a 20% restocking fee, in addition to the return shipping to our warehouse(if applicable). Used items cannot be returned.


All Electronics are final sale!


Please have your mail box or junk mail box checked for status updates.

Shipments, returns & refund

During the payment process, we provide delivery options with different delivery companies with which we have no contractual relationship. We offer commission free this added service so the client can receive its order without having to round trip to our warehouse. If there is any problem with the delivery, it is the consignee responsibility to contact the delivery company he/she dealt with directly. The carrier provide a limited insurance of 100$. If you need more, please contact us prior to purchase as we will get you the quotation for extra insurance from the carrier you will select.

NO return accepted. Exchange upon approval and proof of factory default.

Partial or full refund requests are subject to 5% administrative fees. Refund is immediately issued upon cancellation and a confirmation email is sent. However, depending on the payment method used, it may take one (1) to ten (10) days for the refund to appear in client account.

Special orders are non-refundable.

United States orders may be subject to Custom fees and tax as we ship from Canada. 


Some products may be used for off-road only. Customer is responsible to check with his/her local/state laws and ordinances.

We are not responsible if the client ordered the wrong item, which does not work on its vehicle.

All parts required professional installation, there is no return or exchange if the client does not know how to install it him/herself.

OSS Motorsport is not responsible for defective or damage caused by unprofessional installation or misuse of the product.

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Questions about the Terms of Service should be sent to us at info@oss-motorsport.com.


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