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Description
APR Valve Springs/Seats/Retainers - Set of 40The APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve float common on many applications. APR's design specifications called for a valve spring, retainer and spring seat combination that doesn't overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control. The result is an advanced design that's 28% lighter yet 20% stiffer
The APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve float common on many applications. APR's design specifications called for a valve spring, retainer and spring seat combination that doesn't overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control. The result is an advanced design that's 28% lighter yet 20% stiffer than the high performance OEM Golf R setup and is proven to eliminate the OEM valve train's weakest link. We call it Performance Without Compromise!
Valve Springs:
Weight reduction, and not necessary stiffness, is absolutely necessary to increasing valve control. The APR Valve Spring utilizes a beehive design that allows for a reduction in mass in not only the spring itself, but also through use of a smaller titanium retainer. The springs feature an ovate wire design that allows for even stress distribution resulting in better control at high RPMs through a resistance of harmful valve float inducing harmonics. The lightweight design also accomplishes accurate valve control without requiring an overly stiff spring which has been proven to snap OEM valves in half. Each valve spring weights 29 grams and represents a 19% weight reduction over the OEM Golf R spring. The result is a highly engineered design that's simply plug and play!
Valve Spring Retainers:
Through the use of a beehive design, APR's Engineers were able to design and supply a valve spring retainer that's smaller than stock to reduce weight as much as possible. In an effort to offer extreme weight savings, at an additional 71% over the OEM Golf R retainers, American 6AL4V titanium was used for its high specific strength weighing in at only 2 grams each. By offering outstanding weight savings, exceptional valve control characteristic are achieved while only requiring a modest 20% increase in stiffness over the OEM Golf R spring.
Valve Spring Seats:
Often an overlooked piece of an upgraded valve train is the valve spring seat. The factory heads are aluminum, and unfortunately increased spring pressure can distort or erode the mating surface overtime as they mate directly to the bare head. To prevent this from happening, APR's Engineers designed valve spring seats out of 4140 heat-treated chrome molly steel with a black oxide coating. The spring seats are strong enough to withstand pressure from the springs and provide a mating surface that evenly distributes spring load across a larger area than the spring it self, allowing an increased spring rate without negative side effects to the aluminum head.
Eliminating Valve Float:
It's not uncommon to experience valve float with the OEM valve springs, even below the OEM rev limit. On some applications like the 2.0 TSI, back pressure from the K04 turbocharger has been known to force the exhaust valves open. This has been noticed on vehicles with overly weak OEM valve springs and some with higher miles that have simply lost their stiffness over time. This issue accompanies misfires commonly above 5000 RPM. In some extreme cases, valves are forced open and the vehicle ceases accelerating any further. A quick datalog of intake mass airflow and boost pressure at wide open throttle will show a sudden rise in boost pressure with an immediate loss of airflow as pressure from the open valves is pushed back into the intake manifold. On other applications, valve float can begin to occur just beyond the OEM rev limit. While other components, such as higher strength valves are often required for extremely high revving applications, the APR Valve Spring System will eliminate float well beyond the revving constraints set forth by the other components.
Valve Springs:
Weight reduction, and not necessary stiffness, is absolutely necessary to increasing valve control. The APR Valve Spring utilizes a beehive design that allows for a reduction in mass in not only the spring itself, but also through use of a smaller titanium retainer. The springs feature an ovate wire design that allows for even stress distribution resulting in better control at high RPMs through a resistance of harmful valve float inducing harmonics. The lightweight design also accomplishes accurate valve control without requiring an overly stiff spring which has been proven to snap OEM valves in half. Each valve spring weights 29 grams and represents a 19% weight reduction over the OEM Golf R spring. The result is a highly engineered design that's simply plug and play!
Valve Spring Retainers:
Through the use of a beehive design, APR's Engineers were able to design and supply a valve spring retainer that's smaller than stock to reduce weight as much as possible. In an effort to offer extreme weight savings, at an additional 71% over the OEM Golf R retainers, American 6AL4V titanium was used for its high specific strength weighing in at only 2 grams each. By offering outstanding weight savings, exceptional valve control characteristic are achieved while only requiring a modest 20% increase in stiffness over the OEM Golf R spring.
Valve Spring Seats:
Often an overlooked piece of an upgraded valve train is the valve spring seat. The factory heads are aluminum, and unfortunately increased spring pressure can distort or erode the mating surface overtime as they mate directly to the bare head. To prevent this from happening, APR's Engineers designed valve spring seats out of 4140 heat-treated chrome molly steel with a black oxide coating. The spring seats are strong enough to withstand pressure from the springs and provide a mating surface that evenly distributes spring load across a larger area than the spring it self, allowing an increased spring rate without negative side effects to the aluminum head.
Eliminating Valve Float:
It's not uncommon to experience valve float with the OEM valve springs, even below the OEM rev limit. On some applications like the 2.0 TSI, back pressure from the K04 turbocharger has been known to force the exhaust valves open. This has been noticed on vehicles with overly weak OEM valve springs and some with higher miles that have simply lost their stiffness over time. This issue accompanies misfires commonly above 5000 RPM. In some extreme cases, valves are forced open and the vehicle ceases accelerating any further. A quick datalog of intake mass airflow and boost pressure at wide open throttle will show a sudden rise in boost pressure with an immediate loss of airflow as pressure from the open valves is pushed back into the intake manifold. On other applications, valve float can begin to occur just beyond the OEM rev limit. While other components, such as higher strength valves are often required for extremely high revving applications, the APR Valve Spring System will eliminate float well beyond the revving constraints set forth by the other components.
Features:
- Increase valve train control
- 71% weight reduction over OEM Golf R retainers
- 19% weight reduction over OEM Golf R springs
- 20% stiffness increase over OEM Golf R springs
- Eradicates TSI K04 "valve float" issues
- Supports higher revving application
- Weight saving beehive spring design
- ASTM A877A OTSC round wire steel springs
- 6AL4V American titanium retainers
- 4140 heat-treated chrome molly steel spring seats with black oxide coating
- 29 grams per spring
- 2 grams per retainer
- Compatible with OEM valves
- Spring seats included to protects against aluminum erosion in the head
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4.3 ★★★★★
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Product Reviews
★★★★★ 5
Obsessed with these boards!!
Color: Carbonized, Size: 3-piece
I love these cutting boards! It’s one of those items you don’t even know you need until you get them. Three perfect smaller sizes that can be used for so many different serving ideas. Great quality, great price. Definitely worth the buy!!!!
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Economical and descent for price
Color: Carbonized, Size: 3-piece, Color: Carbonized, Size: 3-piece
Pleased with price, style, color, and the 3 sizes of these carbonized bamboo cutting boards. Based on the reviews had the expectation of the "smell", which is the oil used to seal the cutting boards. (I suspect linseed oil was used based on the lingering smell, as the off-gasing process is longer. It's also cheaper than Tung oil and food grade mineral oil.) I work with wood and various oil sealants so the smell is a non-issue. As there are natural ways to speed that process up and minimize the smell. In addition, I will be using fractionated coconut oil or food grade mineral oil to seal cutting boards on a regularly basis (monthly or more frequent). As we live in a dry climate, hard water, and frequent use.
Appreciate the other reviews which lead to our purchase and reasonable expectation of these cutting boards.
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Reviewed in the United States on May 28, 2026
★★★★★ 4
Good but wood smell
Color: Carbonized, Size: 3-piece
These came with a woodsy smell but the price was great for the quality
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Reviewed in the United States on May 8, 2026
★★★★★ 5
The Best Apologetics Book I've Ever Read!
This is one of the best apologetics books I've ever read!!
Greg Koukl, President of Stand To Reason at str.org has written
a great and informative book that is very thought provoking and
often points out atheist contradictions and logical fallacies
not to mention how lackluster and ignorant atheist thinking is.
Here is a good review of it:
[..]
"Discerning Reader Editorial Review
Reviewed 02/17/2009 by Tim Challies.
Recommended. A valuable tool to assist Christians in sharing and defending the faith.
I have a bit of an aversion to books on apologetics. I don't know exactly why this is, but it may be that many of them seem to teach methods of defending the faith that either manipulate or bludgeon. Somehow grace and apologetics do not seem to go together as they ought. So it was with perhaps just a bit of reluctance that I began reading Gregory Koukl's Tactics: A Game Plan for Discussing Your Christian Convictions. This is a book that promises to teach a new method, a respectful method, of defending the faith and of attempting to convince others of the truth of Christianity. This is not an apologetics 101 text, as in a book that will compare and contrast various apologetic methods; instead, it is a guide, a book that seeks to lead the reader into a new method of sharing his faith with others.
"If you're like a lot of people who pick up a book like this, you would like to make a difference for the kingdom, but you are not sure how to begin. I want to give you a game plan, a strategy to get involved in a way you never thought you could, yet with a tremendous margin of safety." Here is what Koukl promises--he sets no small goal. "I am going to teach you how to navigate in conversations so that you stay in control--in a good way--even though your knowledge is limited. You may know nothing about answering challenges people raise against what you believe. You may even be a brand new Christian. It doesn't matter. I am going to introduce you to a handful of effective maneuvers--I call them tactics--that will help you stay in control."
This tactical approach is a useful one, for it allows you to stay "in the driver's seat in conversations, so you can productively direct the discussion, exposing faulty thinking and suggesting more fruitful alternatives along the way." It is important to note that "tactics are not manipulative tricks or slice ruses. They are not clever ploys to embarrass other people and force them to submit to your point of view. They are not meant to belittle or humiliate those who disagree so you can gain notches in your spiritual belt." Instead, they are ways of guiding a conversation to expose poor reasoning and then use that as a bridge to the truth.
Koukl begins by looking at three basics skills the Christian will need if he wishes to be an effective apologist. First, he must have knowledge, having a familiarity with the central message of the Bible; second, he must have knowledge that is tempered by wisdom that makes his message clear and persuasive; third, he must have the character of a Christian, embodying the virtues of the kingdom he serves.
Then, over the course of four chapters, Koukl unveils his tactic. He calls it "The Columbo." The key to this tactic is to "go on the offensive in an inoffensive way by using carefully selected questions to productively advance the conversation." Never make a statement when a question will do the job. When you ask questions and listen carefully, you gather information that can be used to show a person where his thinking is faulty. Questions can be used to gather information, to reverse the burden of proof or to lead the conversation. Either way, the person asking the question is the person who leads the discussion.
He sets a modest and realistic goal for his interactions with unbelievers. "My goal," he says, "is to find clever ways to exploit someone's bad thinking for the purpose of guiding her to truth, yet remaining gracious and charitable at the same time. My aim is to manage, not manipulate; to control, not coerce; to finesse, not fight. I want the same for you." The goal of this kind of apologetics, then, is not necessarily to win someone to Christ. That may be an ultimate goal or an ultimate hope, but the goal of an individual encounter is nothing more than, in Koukl's words, "putting a stone in someone's shoe." "I want to give him something worth thinking about, something he can't ignore because it continues to poke at him in a good way."
In Part 2 of the book, Koukl offers guidance in finding flaws in the way people reason. He offers specific tactics to unveil poor reasoning and to turn it back against a person. He calls these things like Suicide, Sibling Rivalry, Taking the Roof Off. He offers advice on countering the human steamroller (you've tried to discuss issues with people like this) and the Rhodes scholar, the supposed expert.
When I think of Christian apologetics, I tend to think of Evidence that Demands a Verdict or some of the classics of days gone by. But in this book Koukl offers a new approach and one that is well-suited to the times. He teaches the Christian to think well, to exemplify grace and to humbly lead a conversation to the truth. "We may spend hours helping someone carefully work through an issue without ever mentioning God, Jesus or the Bible. This does not mean we aren't advancing the kingdom. It is always a step in the right direction when he help others think more carefully. If nothing else, it gives them tools to assess the bigger questions that eventually come up."
Apologetics is not always a discipline that is done with grace. But in this book Koukl shares tactics that will prove beneficial to any Christian. They may just revolutionize the way you interact with unbelievers. I highly recommend it."
I give this book 5/5 stars and recommend it to both Christians and atheists
alike as well as everyone in between.
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Reviewed in the United States on March 30, 2011
★★★★★ 5
Highly recommend
Format: Paperback, Format: Paperback
I just finished reading tactics; it’s a book every Christian should consider adding to their reading list.
So often we either avoid hard conversations about faith or we jump into them unprepared and emotional. This book does such a good job of equipping believers to slow down, ask thoughtful questions, and engage in meaningful dialogue with people who disagree with us. It’s not about “winning arguments,” it’s about learning how to think clearly, respond graciously, and represent Christ well.
What I really appreciated is how grounded it is in biblical context. It reinforces the tools we already have as disciples (wisdom, discernment, gentleness, and truth) and shows us how to actually apply them in real conversations. It encourages confidence without arrogance and boldness without hostility.
If you’ve ever felt unsure about how to defend your faith or navigate tough discussions, this book is incredibly practical and encouraging.
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Reviewed in the United States on March 2, 2026