SKU: 67359242495

Skunk2 Alpha Valve Spring & Titanium Retainer Kit - B/D/H/K-series

Sale price$152.55 Regular price$169.50
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Description

Skunk2 Alpha Valve Spring & Titanium Retainer Kit - B/D/H/K-seriesSkunk2 is proud to introduce its Alpha Valve Spring and Titanium Retainer Kits for Hondas B series VTEC, D series VTEC, H series VTEC, and K series iVTEC engines. Each kit includes Skunk2s high quality dual valve springs (single for D series) and race proven titanium retainers that are the result of nearly two decades of racing and engine building experience. Each Alpha Valve Spring is manufactured exclusively from super clean, chrome silicone wire

Skunk2 is proud to introduce its Alpha Valve Spring and Titanium Retainer Kits for Honda’s B-series VTEC, D-series VTEC, H-series VTEC, and K-series iVTEC engines. Each kit includes Skunk2’s high-quality dual valve springs (single for D-series) and race-proven titanium retainers that are the result of nearly two decades of racing and engine building experience.

Each Alpha Valve Spring is manufactured exclusively from super-clean, chrome-silicone wire milled in Japan. By using inner and outer springs mated together through a slight interference fit and with differing frequencies, Alpha Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of 10,000 rpm.

Skunk2’s industry-leading Alpha Titanium Retainers are designed to significantly reduce valvetrain mass, resulting in more horsepower and improved valvetrain stability. Similar to Skunk2’s already popular Pro Series Titanium Retainers, Alpha Titanium Retainers feature radius-cut edges for additional rocker arm clearance and reduced weight, strategically positioned lightening grooves, and reduced overall heights for better valve seal clearance and even further weight reduction.

Alpha Titanium Retainers are manufactured using the latest 3D CAD (Computer Aided Design) and FEA (Finite Element Analysis) to ensure that each is optimized for strength as well as for reduced weight. Skunk2 engineers then test and prove their designs on the engine dyno as well as the race track. Once approved for manufacturing, only medical-grade titanium that’s been ultrasonically inspected and certified is used. Following CNC machining, each retainer is then individually inspected to ensure proper hole diameter, taper, and that each are free from machining defects to ensure proper installed valve spring heights and pressures. Finally, each retainer is serialized for your protection, including valuable information, like material batch specifics as well as production and inspection dates.

Skunk2 designs, develops, and tests its entire valvetrain lineup in-house to ensure superior quality and maximum performance gains. During development, each valvetrain component is tested both on the dyno and the road, including 11,000 rpm drag racing engines and 17,000 rpm superbikes. Manufactured from the best materials available, Skunk2 valvetrain components provide exceptional performance, reliability, and quality and remain standard-issue on each Skunk2 vehicle that we build and support

Engine Applications:

  • D-series* VTEC - D16Z6 (Si/EX), D15B (JDM), D16Y5 (HX), D16Y8 (EX)
    *single springs
    Seat pressure: 165lbs @ 1.500" / Pressure: 585
  • B-series VTEC - B16A/B, B17A, B18C/C1/C5
    Seat Pressure: 68lbs @ 1.320”
  • H-series VTEC - H22A1/A4 & JDM H22/H23 VTEC
    Seat Pressure:Seat Pressure: 50lbs @ 1.400” -- Open Pressure: 205lbs @ 0.900” / Coil bind: 0.880"
  • K-series* - K20A/A2/A3/Z1/Z3, K24A2
    Seat Pressure: 60lbs @ 1.600”

*K-series Alpha Spring Info:

Seat Pressure: 60 lbs at 1.600”
Open Pressure: 220 lbs at 1.100”
Coil Bind: 1.000”

K-series engines that are originally equipped with single valve springs must use a K-series dual valve spring base kit (available separately) and cotters (keepers) from pre-2004 K20A2 engines.

When using Skunk2 Titanium Retainers on 2004 and newer K engines, pre-2004 keepers (cotters) must be used (Honda P/N 14781-PR7-A01). Pre-2004 keepers can be identified by the absence of marks along the top edge (2004 and newer keepers feature laser-etched marks along the top edge). For applications where 2004 and newer keepers are used, Skunk2 Titanium Retainers must be used. Proper retainer/keeper selection is important due to varying angle ratios between earlier and later keeper designs. Use of improper retainers and/or keepers may result in potential engine damage.
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: 67359242495

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Lynn
Port Orchard, US
★★★★★ 4
Excellant value
Special Size: Wide Leg Crop, Size: 14, Color: Rinse, Special Size: Wide Leg Crop, Size: 14, Color: Rinse
Purchased the “cropped” length. I am 5ft 3.5 inch. Weight 170lbs (42 inch hip/38 inch waist) normally wear a size 10/12 or 31 in jeans, depending on the brand. I ordered up at 14 for these based on other reviewers. (When held up to other jeans they were the same as a Talbots 10 at the waist) Prewash they felt good, a little big& length hit at the top of my foot. After wash and dry, the fit was almost perfect and the length was at lower ankle. Ordering up is probably the right choice, although I think I could have been comfortable in a 12 (with no drying). They are a tad bit too long for a “cropped” look IMO. The wide leg is a true wide leg and falls straight from the waist. The material is heavy and there is almost no give/stretch - so a traditional denim. This is the dark blue and it is a true dark blue. You can’t beat the price, excellent value.
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Reviewed in the United States on March 31, 2026
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Mrs. Propes
Dallas, US
★★★★★ 3
Cropped ones are better, size issue with full length pants
Special Size: Wide Leg, Size: 18, Color: Authentic Medium Wash
These are very small in the waist and about 8 inches too long (and I'm not even that short). Very well constructed though so I'll keep them on hand as I'm on a weight loss journey. These were an 18 and fit more like a larger 14. The cropped ones are AWESOME. I ordered a second pair in a different color. They fit absolutely perfectly and hit me around the ankle length wise. Adore them.
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Reviewed in the United States on September 28, 2025
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ITSJUSTME
Lexington, US
★★★★★ 5
GET THESE JEANS!!
Special Size: Wide Leg Crop, Size: 12, Color: Iced Blue Light Wash, Special Size: Wide Leg Crop, Size: 12, Color: Iced Blue Light Wash
I ordered these jeans because they were recommended by a youtube influencer and I have 0 regrets! They are a fairly heavy denim with just the right amount of stretch to them. I'd consider them to be mid to high waisted since the closure is right below my belly button. However, if I hike them up a bit they sit right above the belly button. I washed and dried them with little to no shrinkage. Length-wise they're slightly cropped on me, and fall right above the ankle. These jeans are honestly SO versatile because they look great with ballet flats, heels, tennis shoes, AND suede or leather ankle boots! Since I couldn't decide, I ordered them in two colors (iced blue light wash & medium blue vintage), and I love them both!! For reference, I'm 5'6 and 170 lbs. I ordered size 12 and they fit great. Highly recommend. You CANNOT beat the price for this level of quality in my opinion!!
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Reviewed in the United States on October 4, 2025
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Jaime
Pawtucket, US
★★★★★ 5
My everyday Jean
Special Size: Wide Leg Crop, Size: 8, Color: Medium Blue Vintage
They don’t have much of a stretch to them but they do get a bit more lose around the waist when you wearing often. Got a size 8 was tight but after a few uses they got perfect. Be Definitely is a thick jean material tucks in any unwanted over hang. Don’t tumble dry they do shrink
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Reviewed in the United States on May 16, 2026
K
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Kindle Customer
Bozeman, US
★★★★★ 4
Good Jean for the price waist hips run small
Special Size: Wide Leg, Size: 18, Color: Black
These pants are good for the price. I needed a pair of wide leg black jeans and the price on these was good. Reviews said the waist was small. I’m a 16/18. Got an 18. And the high waist (up to my belly button) fits snug but has a little give. Still comfortable to wear. The butt thigh area fits snugger than most wide leg pants but again not so tight or uncomfortable to not wear. The fabric is a brushed Jean fabric not just a woven cotton Jean so dog hair sticks to it like glue. They are a heavy quality fabric so not a summer pant. They are a keeper for me. If a gain a few pounds I can these being a no go.
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Reviewed in the United States on February 27, 2026

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