- Description
- Fitment
- Refund Policy
The Goldenwrench Blackline Performance BMW M Car S58 Engine Cap Cover Set is a precision-machined engine bay upgrade engineered for BMW M vehicles equipped with the S58 engine. CNC-formed from high-strength T6 aluminum and finished with an anodized coat and 3D-milled detailing, this cap set delivers a refined, motorsport-inspired look across both the oil cap and coolant cap positions — replacing flat factory plastic with purposeful billet components.
Available in Edition Red, Motorsport Blue, and Anthracite Grey, each cap receives its branding through advanced 3D milling rather than decals or paint — meaning the finish holds up to engine bay heat, cleaning, and long-term use. These are precision overlay covers that install directly over the factory oil and coolant caps, preserving OEM functionality and sealing integrity while transforming the underhood appearance. The design language is consistent with the broader Blackline product line, making this set a natural complement to other Blackline components already on the vehicle.
Installation requires no modification and no special tools. Covers affix over the factory caps and seat securely in place. The process takes only minutes, and the result is a clean, cohesive engine bay finish suited to both daily-driven M cars and show-level builds.
Product Details
- CNC-machined billet T6 aluminum construction
- Available finishes: Edition Red, Motorsport Blue, Anthracite Grey
- 3D-milled logos and detailing — no decals or surface stickers
- Premium anodized coating for heat and wear resistance
- Installs over factory oil and coolant caps — no cap replacement required
- No tools or modification needed
- Compatible with S58 engine-equipped BMW M vehicles
Vehicle Applications
- BMW G87 M2 (S58 Engine)
- BMW G80 / G81 M3 (S58 Engine)
- BMW G82 / G83 M4 (S58 Engine)
- BMW F97 X3M (S58 Engine)
- BMW F98 X4M (S58 Engine)
- BMW F95 X5M LCI (S68 Engine)
- BMW F96 X6M LCI (S68 Engine)
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BMW G09 XM (S68 Engine)
Notes
- These are cap covers, not full cap replacements. Factory caps remain in place.
- Fitment is specific to S58-equipped vehicles. Verify engine designation before ordering.
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.
