SKU: 27507481410

Performance Valve Springs and Retainer Kit

$292.48 $324.98
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

Performance Valve Springs and Retainer KitThe XDP Performance Valve Springs and Retainer Kit XD386 are a perfect upgrade for your modified 2001 2016 GM 6. 6L Duramax. Camshaft upgrades and other modifications that increase boost require more valve control. The XDP Performance Valve Spring feature a conical design for better valve control than a standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and

The XDP Performance Valve Springs and Retainer Kit XD386 are a perfect upgrade for your modified 2001-2016 GM 6.6L Duramax. Camshaft upgrades and other modifications that increase boost require more valve control.

The XDP Performance Valve Spring feature a conical design for better valve control than a standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and is computer load mapped, to ensure quality and long-term reliability.

Each spring is matched within 1 lb of seat pressure to ensure consistency. Sold as a complete set with valve springs, retainers, and locks. Each kit is backed by XDP's 1-year unlimited mileage warranty.
Features:

  • 125 Lb. Seat Pressure
  • Conical Spring Design
  • Performance Valve Spring Kit
  • Essential For Elevated Boost Levels
  • Complete Set (Springs, Locks and Retainers)

Specifications:

  • Installed Height: 1.610 inch
  • Installed Pressure: 125lbs
  • 210lbs at 1.110 inch
  • Coil Bind: 1.050 inch
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 27507481410

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4.6 ★★★★★
Based on 934 reviews
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StylishFamilyLife
Draper, US
★★★★★ 5
Great suit jacket
Color: Navy Blue, Size: Large, Color: Navy Blue, Size: Large
We bought this for my son’s school dance and his confirmation. They matched his suit pants that we purchased from a department store and the jacket fit perfectly, running true to size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 3
Decent
Color: Black, Size: X-Large
Smells strange, assuming its the dye. Good fit, although the arms are quite long. Also had some strange stitch going across the left breast area that seemed like a mistake and was an eye sore. Good value overall for a quick put together suit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 9, 2025
V
Verified Purchase
Veronica
Battle Creek, US
★★★★★ 5
perfect fit, excellent quality
Color: Navy Blue, Size: XX-Large
Fit perfect true to size great quality loved it on my husband
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Reviewed in the United States on May 29, 2026
S
Verified Purchase
stanley h.
Birmingham, US
★★★★★ 5
Nice Suit For The Price
This suit was a time-saver! My wife ordered a tux that wasn't going to make it for a formal occasion, so this was ordered and came within three days. It was a good thing she purchased 2, in case of sizing errors. The extra large pants worked, but sizing down to the large jacket & vest made the best combination/fit. We didn't go with the blue/black bow tie & flower it came with, but may for another event. However, being able to work interchangeably at a low price was rewarding!! Thought to add comments that the look of this suit is pleasing (though it's not the best thread). The workmanship gives it a 5 and even greater. The compliments were many. I do suggest using a good steam iron that will eliminate the wrinkles, without creating unwanted creases, while barely touching the suit; but, definitely follow the creases in the pants leg.
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Reviewed in the United States on March 20, 2025
P
Verified Purchase
Peggy Cole
Whiting, US
★★★★★ 5
Disappointed
Size: XX-Large, Color: Light Grey, Size: XX-Large, Color: Light Grey
Overview of the Purchase Experience I recently ordered a 3-piece suit for my significant other, who is quite tall at 6’8”. I was excited about this purchase, hoping it would be a stylish addition to his wardrobe. However, upon receiving the suit, I encountered several issues that I feel compelled to share. Color Discrepancy One of the most disappointing aspects of this order was the color inconsistency. The suit was supposed to be a cohesive set, but it arrived with two different colors. This mismatch not only detracted from the overall aesthetic but also made it difficult to wear as a complete outfit. When purchasing a suit, especially a three-piece one that includes trousers, a vest, and a jacket, one expects all pieces to match in color and style. Unfortunately, this was not the case here. Quality Concerns In addition to the color issues, I found the quality of the fabric and construction to be subpar. The material felt cheap and did not have the durability or elegance one would expect from a suit. The stitching appeared uneven in places, and there were loose threads that raised concerns about its longevity. A well-made suit should exude quality and craftsmanship; however, this product fell short on both counts. Fit Issues Related to Height Given my significant other’s height (6’8”), finding suits that fit well can be challenging. While I cannot recall his exact weight at this moment, it’s important to note that tall individuals often require tailored fits or specific sizing options that accommodate their stature. Unfortunately, even if the colors had matched and the quality had been better, I doubt this suit would have fit him properly without additional alterations. Conclusion Overall, my experience with this 3-piece suit has been disappointing due to color discrepancies and poor quality construction. For anyone considering purchasing this item for someone tall or for themselves, I would recommend looking elsewhere unless you are prepared for potential issues with fit and appearance. Peggy Cole FabFashiion not approved
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Reviewed in the United States on September 24, 2024

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