SKU: 30820602499

ST Suspension XA Height, Rebound Adjustable Coilover Kit for 04+ Porsche Boxster incl. Boxster S (18271016)

Sale price$868.05 Regular price$964.50
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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31

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Description

ST Suspension XA Height, Rebound Adjustable Coilover Kit for 04+ Porsche Boxster incl. Boxster S (18271016)The ST XA coilover kit allows you to adjust the look of your vehicle with the stepless lowering. We manufacture the adjustable spring perch from a resistant and friction optimized polyamide composite material with stainless steel insert. Thanks to the composite material, in contrast to the anodized aluminium spring perches, possible oxidation is prevented. So you can permanently use the height adjustment of your ST XA coilovers. With our in 16 clicks

The ST XA coilover kit allows you to adjust the look of your vehicle with the stepless lowering. We manufacture the adjustable spring perch from a resistant and friction-optimized polyamide composite material with stainless steel insert. Thanks to the composite material, in contrast to the anodized aluminium spring perches, possible oxidation is prevented. So you can permanently use the height adjustment of your ST XA coilovers. With our in 16 clicks adjustable rebound damping, you can further adapt the perfectly to your car pre-set damper setup to your driving profile with just a few manual steps. The adjustable rebound damping gives you the possibility to adapt the ST coilover kit either more comfortable or sportier.

The galvanized coilover struts are, as usual in the standard equipment, made of galvanized steel and our additional sealing ensures an optimized corrosion protection. We protect the inner values of your high-quality ST coilover suspension including its KW dampers with a low-friction and pressure-resistant damper housing, the use of a hard chromed piston rod and a mono block guiding- and sealing package.

Do you want to get more than just a lowering of your car? Then our ST XA coilover kit is just the right suspension for you! Thanks to the adjustable KW dampers, you can always further refine our recommended setting for your vehicle, to set your car even sportier or more comfortable. In any way, your vehicle gets a much better road holding with our ST XA coilover kit and it looks great with the continuously lowering.

Features:

  • Direct Steering Behavior
  • Improved Handling
  • Increased Driving Comfort
  • Composite Spring Perch
  • Two Piece Racing Spring System
  • Dust Protection & Weather Resistant

ADVANTAGES OF A ST COILOVER SPRING STRUT:

  • ST Suspensions - Spring Strut Construction
  • Excellent all around performance, provides a balance between performance and comfort for everyday use
  • High-quality components for long durability
  • Use of twin-tube technology, independent reactions from damping inputs minimized chassis vibrations and increase driving dynamics
  • Coilovers come with all necessary components, vehicle-specific certificate and insallation instructions

Functional principle of twin tube shock absorbers
With a Twin-Tube shock absorber, the piston works inside of an inner Tube. The space between the inner tube and the casing is used as an equalization chamber. Changes in volume due position of the piston rod change the oil level in the equalization chamber between the outer casing and inner Tube.

Compression phase:
When the car swings downwards in the direction to the road, the piston rod is moved downwards.The oil displaced by the piston rod is pressed into the equalization chamber between the Tubes via specially designed orifices in the compression valve at the lower end of the inner Tube. The resistance that is created through this valve creates the actual compression forces. Oil underneath the piston also flows upwards through the piston check valve with low resistance which also influences the damper characteristics.

Rebound phase:
When the car swings upwards, away from the road, the shock absorber is extended. The piston rod is extending outward from the housing. The rebound phase valve at the lower Tube resists the oil that flows downwards through the holes in the space above the Tube. Therefore the upward motion is slowed down. When the piston rod is pulled out of the case, its volume is balanced out by the oil that flows from the equalization chamber back into the inner tube through the compression check valve.



Functional principle of mono tube shock absorbers
With a one-piston shock absorber, the piston works directly in the damping case. Both, traction and also compression phase valve are integrated into the piston at the end of the piston rod. Depending on the velocity with which the shock absorber is compressed or extended, the forces rise. A characteristic is the separating piston that separates the oil from the gas space which is under strong pressure. The gas space balances the oil expansion with temperature differences and volume changes while the piston rod retracts. The separating piston thereby moves upwards and downwards. The gas pressure of 25-30 bar in the separating space is necessary in order to support the damping forces in direction of the pressure direction.

Compression phase:
When the car swings downwards in the direction to the road, the piston rod is moved downwards. The compression phase valve on the top of the valve resists the oil that streams upwards through holes. Therefore, the downward movement is slowed down. The separating piston is thereby lowered by the same degree as the piston retreats downwards. The gas pressure underneath the separating piston thereby prevents the oils from foaming above the piston.

Rebound phase:
When the car swings upwards, away from the road, the shock absorber is extended. Thereby, the piston rod is moving out of the damping case. The rebound phase valve at the lower piston resists the oil that flows downwards through the holes in the space above the piston. Therefore the upward motion is slowed down. The separating piston is thereby lifted upwards by the same degree as the piston extends.

Item is special order.  Once ordered there are no cancellations for any reason.

 

Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 30820602499

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Kasley.K
Grantham, US
★★★★★ 4
Sweet second-chance romance
Format: Kindle
When You Smile was my introduction to Melissa Brayden’s writing, and Dream a Little Dream confirmed that this author creates lovely stories with amazing characters. This book was a sweet second-chance romance with enough sad moments to make me shed some tears. It also has a surprise reveal that I didn’t see coming and a small-town community that made me feel warm and cozy. I loved Kyle and Savanna. Their first meeting nearly got me giggling, but I was definitely kicking my feet and smiling like a fool. Savanna was endearing and had a knack for public announcements. I felt deeply for her and truly understood her reaction after getting hurt. As for Kyle… is there a word to describe her? I could feel her aura bleed through my screen. Her flirting and ability to get through Savanna’s defense left me swooning one or two times. I honestly don’t know how Savanna managed to stand on business so 10 out of 10 for her effort. I really enjoyed Dream a Little Dream and can’t wait to read another Melissa Brayden’s book.
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Reviewed in the United States on May 15, 2025
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Patricia L Estes
Waukegan, US
★★★★★ 5
Wonderful
Format: Paperback
This was a hard book to put down. The characters of Svanna & Kyle are so well developed, as our their families and friends, who just enhance the whole story. When Savanna is left on the bridge, my heart broke, was amended later, and fulfilled by the end of the book.
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Reviewed in the United States on September 1, 2025
G
Gary L. Jones
Massapequa, US
★★★★★ 5
Dream…
Format: Kindle
I loved this book right from the get-go. The snappy repartee between Savanna and Kyle made me laugh and shiver with delight all through this book. Toss in all the great characters in Dreamers Bay and I was sold! Wonderful story, great plot twists, fantastic highs and lows. A true smorgasbord of emotions. Thanks Melissa…
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Reviewed in the United States on January 22, 2026
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Angela
Boise, US
★★★★★ 5
Loved this book so much
Format: Kindle
First, it’s a cute story with a great themes of: younger older woman, daughter‘s friend, disgruntled with family. I have to admit every time the main character was talking to her father I was so incredibly annoyed. It brought up all the conversations I’ve ever had with misogynist in my life. Definitely well written. On happier notes; the love story, the meddling neighbor/landlord, cute child, and kittens! Really, what story isn’t made better by kittens? Seriously this is an exceptionally well written story with fantastic characters, plot lines, and a great ending.
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Reviewed in the United States on March 14, 2025
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R S Jordan
Cuba, US
★★★★★ 4
A Thoughtful and Compelling Romance with Depth and Maturity
Format: Kindle
Miranda MacLeod and TB Markinson deliver a compelling and emotionally charged romance in The Anatomy of Forever, a novel that successfully balances personal transformation, ethical dilemmas, and the weight of professional responsibility. Dr. Rowan Colchester, newly embracing her true self after a difficult divorce, is not prepared for the whirlwind that follows a passionate encounter with a younger woman. When fate reunites her with Dr. Simone Doucette, an idealistic doctor seeking solace in a Cape Cod ER, their undeniable connection becomes fraught with complications. The revelation of their unexpected personal link adds a layer of tension that challenges not only their burgeoning relationship but also their careers and reputations. As the stakes rise, Rowan and Simone must navigate professional ethics, small-town scrutiny, and their own vulnerabilities to fight for a second chance at love. While the “sleeping with your daughter’s best friend” trope initially presents a hurdle, the novel compensates with a well-developed plot that offers depth beyond the romance. MacLeod and Markinson craft a narrative rich with stakes that extend beyond the personal, grounding the story in a high-stakes professional and community-driven context. The characters are well-drawn and compelling, both Rowan and Simone stand out as confident, determined, and capable women who refuse to be defined by societal expectations or past mistakes. Even secondary characters, such as Erica, evolve in ways that add nuance to the story. A refreshing aspect of The Anatomy of Forever is its portrayal of strong, independent women who communicate effectively and fight for what they want. Rather than relying on contrived misunderstandings or overplayed angst, the novel explores mature relationship dynamics, making the romance feel authentic and rewarding. Overall, this is a well-executed sapphic romance that offers substance, well-rounded characters, and a satisfying blend of personal and professional stakes. MacLeod and Markinson have crafted a narrative that is engaging, thought-provoking, and ultimately, deeply satisfying.
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Reviewed in the United States on March 25, 2025

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