BBC CHEVY 4340 FORGED K-1 572 CRANKSHAFT 2PC RMS 012GAG438

File photo. Actual appearance may vary.

This is a first line product from K-1 engine products.

K1 Technologies Forged Crankshafts

K1 Technologies forged crankshafts offer world-class design that’s affordable. Their energy transfer technology forges top-quality crankshafts from 4340 steel that’s core-hardened and tempered to reduce stress and optimize tensile strength. K1 uses a nitriding process for hardening–not induction heat-treating–to eliminate softening between the journals and any post-running deformation. The forged crankshafts feature straight oil holes for the best oiling to the rod journals, to ensure that you’re getting the most and the best for your dollars. Counterweights are placed for optimal load reduction and ease of balancing–meaning less work for you–and each crankshaft is magnetic particle inspected, as well as held to a maximum tolerance of .0002 in. journal dimension. K1 Technologies forged crankshafts offer high performance to meet your high standards!

Important Note.

This crankshaft must be balanced with your pistons and rods before use.

For use in big block Chevy engines with the 2 piece style rear main seal. 4.375″ stroker crank. This crank requires the use of an INTERNAL damper and flexplate or flywheel.

Counterweights are profiled for 6.385” connecting rods.

Horsepower rating for this crank is approx. 800+

Listed below is an upgrade we consider very beneficial and requested by many.

Crank polishing: Extends bearing life, reduces oil temp, frees up a slight amount of average horsepower. This is a very low cost upgrade, and in the world of mass production, most cranks do not come with a true polished finish. This is why most machine shops have a machine to do this. The difference is dramatic between a crank right out of the box and one that we have polished. Bearing companies claim that cranks that have better finishes on the journals will survive the break-in better, and have much longer bearing life. We do a three step process and bring the RA numbers down in the single digit range. We have the most advanced crank polishing machine on the market. We find this to be an excellent upgrade for your engine build, considering the low cost. We polish the crank for every engine we build.

Cost for this crank polishing upgrade is $38.50 We have this upgrade featured in our other listings. You can see this and other upgrade options in our ebay store under the “UPGRADES” category, or simply do a search with the key word, “Upgrade” in the search bar when shopping in our ebay store. Before you finalize your purchase of this assembly you may add any of these upgrades to your shopping cart.  Click here to add upgrades.

The appearance of the journals show a dramatic difference once polished.

RETURN POLICY Should a problem occur, please contact us. If a return is necessary, please contact us for an RGA number and return authorization. The RGA number must be included on the return label. If an item is returned without an RGA number, it will not be processed. A full description of what the problem is needs to be included with any returned product with your contact info, and proof of purchase. Even though you may have explained the problem to us, and been granted permission to return the product, we must have a written explanation and a contact number included with the product. It is also recommended that you include the name of the person from our company that you have been in contact with. You must send the item back to us in a trackable manner (USPS Priority Mail, FedEx, etc.) and keep the tracking info of the returned product. Please give ample time for returns to be processed. Following these guidelines will make the return process work as it should.   PAYMENT AND SHIPPING DETAILS.   We offer great discounts on shipping. You only pay the full shipping fee on the highest shipping cost of your items, and HALF PRICE shipping on all additional items. Few offer discounts on shipping such as this. Our checkout system will automatically calculate your shipping discount at the time of final payment, providing you consolidate your payment. You may receive a verification and tracking number shortly after purchase, but this does not necessarily mean that your product has shipped. It would be fair to say that 98% of products will be going out the day the shipping label is issued. On occasion, the product may not ship out until the next day after the label has been issued. Most products purchased late in the day will not be shipped until the next day.     If you checkout and start over, the auto calculator will not recognize the multiple purchases, and there will be no shipping discount.    UPS is our primary shipper. We are unable to ship to APO/FPO addresses or PO Boxes. Help us ship your order promptly by including your physical address at checkout. Below is a map representing the estimated delivery time to get to you from our location. Delivery times may vary, especially during peak periods. UPS delivers Monday – Friday, except for national holidays. If a package leaves here on a Thursday, and you are in a 2 day delivery zone, your package will deliver to you on Monday. Expedited shipping is available upon request for an additional fee. Please contact us for rates. The estimated shipping time is usually as the map shows, but many factors can delay this.  Alaska is in a 3-day ship zone, Hawaii is in a 6-day ship zone, and Puerto Rico is in a 4-day ship zone. Additional fees will apply to shipments to these areas, as noted below. The shipping quoted in this ad is only for the 48 continental United States. If shipping to anywhere else, please contact us. The half price shipping on all additional items also only applies to items that are being shipped in the 48 continental United States.