Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Supertech BMW Dual Valve Spring | S42/M42/M50/S50/M52/S52/M54Super reliable valve spring kits highest quality, and always the best price! Supertech performance valve springs are made with premium Superclean Chrome Silicon Vanadium Steel Alloy for higher performance and durability. Computer designed to ensure that wire stress levels do not overpass the limits for long durability under extreme conditions and harmonics are well under control. Supertech Retainers are manufactured with high quality military
Super reliable valve spring kits - highest quality, and always the best price! Supertech performance valve springs are made with premium Superclean Chrome Silicon Vanadium Steel Alloy for higher performance and durability. Computer designed to ensure that wire stress levels do not overpass the limits for long durability under extreme conditions and harmonics are well under control. Supertech Retainers are manufactured with high quality military certified Titanium alloy, CNC machined for a tight fit that will ensure a long durability.Note: Priced Individually
Specs:
- Type: Dual Spring
- Seat Press: 94lbs @ 35.7mm
- Coil Bind: 20.7mm
- Open (Lift) Press: 209lbs @ 10.00mm
- Rate: 11.5lbs/mm
- Inner Spring: 20.5m OD / 15.5mm
- Max Net Lift: 15mm
- Outer Spring: 29.65mm OD / 21.85mm ID
Fits:
M50TU |
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M50TU |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.1 ★★★★★
Based on 1388 reviews
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Product Reviews
★★★★★ 5
Pretty in Pink!
Special Size Type: Full Zip, Size: Large, Color: Flamingo Pink
I wear this jacket almost every day! The color is a pretty bubblegum pink and is just as shown in the ad. Being high quality, it does not fade nor bleed when you wash it, it is true to size but does have stretch for comfort. You can put this in the dryer and it does not shrink! The pockets are a decent size and have zippers to keep your items safe. It is thick enough to keep you warm but not too thick to where you will overheat. Perfect for a breezy day!
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Reviewed in the United States on September 9, 2025
★★★★★ 5
Great find
Size: Large, Color: Black
Great fit and length. As well as quality fabric. Cute and comfy.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Super comfy and practical
Size: XX-Large, Color: Emerald Green
Buttery soft and comfy, great for exercise or for going out. I live in a hot climate so I’ll be getting more of these.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Great comfortable skirt
Size: Medium, Color: Navy
Great tennis skort! Comfortable and hits mid thigh (I am 5’2”). I use it every week for my women’s tennis doubles!
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Very cute & nice material
Size: Medium, Color: White
Love this skirt. It’s is cute on with a hidden cell pocket. Got compliments first time I wore it. I bought this as an alternative to shorts. I like the material - easy to pack.
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Reviewed in the United States on July 24, 2025