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Real experience
We test before we recommend.
PRODUCT DESCRIPTION
Double Valve Spring Kit for Valve Cover Conversion Kit
Seat Pressure: 82 lbs @ 41mm
Open Pressure: 186 lbs @ 10mm
Max Lift: 14.5mm
Coil Bind: 24.50mm
Outer Spring I.D.: 19.3mm
Quantity Retainers: 24
Retainer: RET-BM2521/T1S-LC
Quantity Kit Springs: 24
Kit Spring: SPR-2521/2
Rate: 10mm
Inner Spring I.D.: 14.5mm
Inner Spring O.D.: 19.3mm
Outer Spring O.D.: 26.4mm
Seat Locator: SEAT-BMS54
Engines
BMW - S54B32
Manufacturer: SuperTech
SKU: SPRK-2521-2BM-T1S-LC
These images are representative; actual product images may vary.










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.