Visconti Upgraded B58 Cam Cap Bolts (6 PORT/2 PORT)
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Visconti Tuning
VIS VB58F0100B
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The OE B58 Fasteners are TTY (Torque to Yield), this method is cheap to produce in large quantity using mediocre material standards. This method of fastening allows each fastener to reach its maximum theoretical elongation to provide maximum clamping force given that material property and strength.
The major problem with this method is that the fasteners are not reusable. The second problem is that under scrutiny of clamp load 2 fasteners side by side are not applying the same appropriate force within reason. If we cannot rely on even distribution of load, we cannot rely on these fasteners and its showing in the failures we are seeing. The third problem is the availability of replacements, this means a lot of these fasteners are not being replaced during engine rebuilds.
The OE Cam Cap Bolts have been a problem BMW has been aware of for some time now. The hardware has been revised and certain models have open TSBs. Although the the improvements from BMW is a step in the right direction we feel this latest update isn't a fix. Our upgraded hardware kit will prevent the cam caps from becoming loose and causing damage to the cylinder heads casting.
- Specifically designed to support the load and tensile requirements of increased output.
- Required to reach ASTM conformance certification. All Material must conform to AMS batch raw materials.
- Thread engagement and shank is optimized for each given bolt in its specific location.
- Meet or exceed a minimum allowable tensile strength of 190kpsi.
- Custom age hardened
- Corrosion resistant, there is no coating or plate film to wear or degrade.
- Reusable indefinitely unless over yielded past acceptable elongation.
6 port kits contain 13 long and 22 short bolts, use a dab of engine oil and toque to 13ft/lb
Returns Policy
--PLEASE NOTE: MOST ORDERS ARE SUBJECT TO RESTOCK OR CANCELATION FEE. PLEASE CALL OUR OFFICE FOR DETAILS AND EXCEPTIONS-- You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
