Double Valve Spring
IPD - 100821
- IPD Item Number: 100821
- Brand: IPD
- Quality Level: Best (better than OE)
- Units Per Car: 8
- Product Group: Performance parts
- Warranty: One Year Parts Warranty
Product Attributes
- IPD Item Number: 100821
- Brand: IPD
- Quality Level: Best (better than OE)
- Units Per Car: 8
- Product Group: Performance parts
- Warranty: One Year Parts Warranty
Product Information
Product Description
For B18 or B20 heads. One inner and one outer spring. Cylinder head must be flycut for larger diameter of outer spring.
If your machine shop does not have the correct mill for enlarging the valve spring seats for double valve springs, you can purchase one from Isky Cams (part # 208).
Double valve springs are vital for maximum performance above 5,000 RPM. Performance grind cams have steeper slopes on their lobes and consequently the lifters and connected valve train have a harder time staying in contact with the lobe surface. The higher seat pressure and higher spring rate assist in making sure the valves are doing what the cam is calling for. Additionally they offer a safety margin in case one spring breaks the other will keep the valve clear of the pistion crown.
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A Core Charge is a refundable deposit added to the price of a product by a manufacturer as a bounty to encourage the return of rebuildable cores.
Cores must be complete (mostly assembled and not missing parts) to qualify for refund.
Cores must be complete returned in the manufacturer's box with part number markings to qualify for refund. Typically, the core is returned in the box that contained the replacement product.
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Products from major brand names like Volvo Genuine, Bosch, Mahle, Aisin, etc. are almost always in stock in the manufacturer’s domestic warehouse. These suppliers have good fill rates, but even if they are out of stock, we may be able to source it from a variety of alternative source. We are at the most 10 days away from all those warehouses, usually much less. Does that mean we will always have your product available within that window? Honestly, no. There are many factors that can delay things by a few days but we’ll do everything we can to fulfill your order in a timely manner.