01
Real experience
We test before we recommend.
PRODUCT DESCRIPTION
The ZRP Crankshaft for BMW M3 S14B23 is manufactured from solid aerospace grade 4340 steel and no compromises have been made in material quality, to ensure the best product possible. This crankshaft was carefully designed from our vast experience, to provide the best possible engine performance and the production process consists of very strict inspections to ensure it has the best quality and tight tolerances for a perfect fit. The BMW crankshaft is fully balanced to 1 gr.cm /- 0.1 using state-of-the-art Sunnen machines, balancing results report included. Please check the individual features for your application below. Product Features and Design Aero-Wing counterweights to reduce windage for increased horsepower. Straight oil holes for improved connecting rod journal lubrication. Chamfered oil holes. Journal radius disperses load stress. Tapered connecting rod journals for reduced weight. ZRP Crankshaft Technical Features: Full CNC machining. Ion (plasma) nitriding process for hardening. Multi-stage heat treatment. Shot peening for stress relief. 100% Magnafluxing for an impeccable surface finish. Heat treatment for superior wear resistance. Micro-polished for longer bearing life. Ultrasonically tested and X-rayed to ensure a reliable final product.










WHY THETUNERLAB
We have spent years building cars, racing, and testing the exact same parts that we sell.
01
We test before we recommend.
02
We help you choose the right part.
03
Only trusted manufacturers.
04
Before and after the purchase.
+10 years
of passion for drifting
+30.000
available products
+5.000
satisfied customers
24/7
passion for motoring
Each product indicates compatible models in the product description. If you have any questions, you can contact us and we will help you choose your best option.
-If the product is in stock, the usual delivery time is 2 to 5 working days.
-If the product is out of stock, the delivery time is 7 to 15 working days.
All our products come with the manufacturer's official warranty and comply with current regulations.
Yes. We ship orders to Spain and most European countries using specialized transport agencies.
You can contact our team via WhatsApp, email, or our website's contact form.
Shipping costs depend on the type of product, its weight, dimensions, and the destination country. In most cases, the amount is calculated automatically during the checkout process before the order is finalized.
For some products, especially large items or those with special characteristics, shipping costs may require a manual review. If the amount shown does not match the actual shipping cost, we will contact you before processing the order to inform you of the final cost and request your confirmation before proceeding. We will never charge any additional fees without your authorization.