- Description
- Fitment
- Refund Policy
The MMX Performance BMW S58 Billet Oil Filter Housing Cap is a precision-engineered upgrade designed to eliminate the common failure points associated with the factory plastic oil filter housing. OEM plastic caps are prone to cracking, deformation, and inconsistent sealing during routine servicing, often resulting in oil seepage and long-term reliability concerns. The MMX billet solution provides a permanent, high-strength replacement that improves sealing integrity, durability, and service confidence.
Each housing cap is CNC-machined from a solid block of 6061-T6 aerospace-grade aluminum using advanced 5-axis machining processes. This ensures exceptional dimensional accuracy, structural integrity, and repeatable fitment. The component is then hand-finished and anodized in a Midnight Black gloss coating, providing corrosion resistance and a refined OEM+ engine bay appearance that withstands repeated heat cycles.
Beyond material strength, the MMX housing incorporates an integrated oil pressure bypass system directly into the billet design. This eliminates the need to transfer or reuse the fragile OEM plastic bypass valve, a process that frequently leads to breakage with other aftermarket solutions. The integrated design ensures consistent oil flow and pressure regulation while removing reliance on failure-prone factory components.
Installation is straightforward and is best performed during a routine oil and filter service. The MMX cap installs directly in place of the factory unit and includes a factory-specification O-ring to ensure proper sealing and leak-free operation. It is fully compatible with OEM oil filters and is optimized for use with the MMX Performance S58 oil filter, helping address the well-documented risk of factory paper filter collapse.
Designed for both daily-driven vehicles and high-performance applications, this billet oil filter housing cap is an essential upgrade for S58 owners seeking improved reliability, consistent oil system performance, and a cleaner, more durable engine bay solution.
Product Details
- CNC-machined from 6061-T6 billet aluminum
- Direct replacement for OEM plastic oil filter housing cap
- Integrated oil pressure bypass system
- Eliminates risk of cracking and oil seepage
- Includes factory-specification O-ring for proper sealing
- Finished in Midnight Black anodizing for durability and OEM+ appearance
- Compatible with OEM and MMX performance oil filters
Vehicle Applications
Related Products
Notes
- Recommended to install during routine oil service
- Prolonged exposure to extreme heat may affect anodized finish appearance
- Finish variation does not impact performance or function
- Oil filter shown for reference only and not included
- Includes a 1-year manufacturer warranty against defects in materials and workmanship
- Designed and tested in the United Kingdom
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
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:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
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 a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
