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Real experience
We test before we recommend.
PRODUCT DESCRIPTION
The ZRP Volvo B230/B234 crankshaft is manufactured from aerospace-grade 4340 solid billet steel, with no compromise on material quality to ensure the best possible product. Designed meticulously based on our extensive experience, this crankshaft delivers maximum engine performance. The production process includes very rigorous inspections to ensure top quality and precise tolerances for a perfect fit. The Volvo crankshaft is fully balanced to an accuracy of 1 g·cm²/- 0.1 using state-of-the-art Sunnen machinery. A report with the balancing results is included. See specific features for your application below.
Product features and design
Aerodynamics: Aerodynamic counterweights to reduce weight and improve crankshaft aerodynamics.
Dual direct lubrication system.
High-speed lubrication system for better oiling.
Chamfered oil holes.
Journal radii to distribute load stress.
Tapered rod journals to reduce weight.
ZRP crankshaft technical features
Full CNC machining.
Ion (plasma) nitriding process for hardening.
Multi-stage heat treatment.
Shot peening for stress relief.
100% Magnefluxing for a flawless surface finish.
Heat treatment for superior wear resistance.
Micro-polishing for longer bearing life.
Ultrasonic and X-ray tested to ensure a reliable final product.










WHY THETUNERLAB
We have spent years building cars, racing, and testing the exact same parts that we sell.
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We test before we recommend.
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We help you choose the right part.
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Only trusted manufacturers.
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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.