SKU: 25001937740

Porterfield Brake Shoes for 1970 MG MGB Spicer

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Description

Porterfield Brake Shoes for 1970 MG MGB SpicerPorterfield Brake Shoes for 1970 MG MGB Spicer Porterfield R4 Porterfield R4 Carbon Kevlar based brake pads were fully designed for heavy duty extreme motorsports use. Its one of the the few true motorsports competition pads available on the market today. The carbon based semi metallic R4 brake material allows the brake pad to absorb huge amounts of heat and dissipate it quickly and evenly over time. The Carbon Kevlar material also allows the brake

Porterfield Brake Shoes for 1970 MG MGB Spicer

Porterfield R4

Porterfield R4 Carbon Kevlar based brake pads were fully designed for heavy-duty extreme motorsports use. Its one of the the few true motorsports competition pads available on the market today. The carbon based semi metallic R4 brake material allows the brake pad to absorb huge amounts of heat and dissipate it quickly and evenly over time. The Carbon-Kevlar material also allows the brake pad to heat up to operating temperature right away so little pad warmup is required for optimal operating condition. This compound also requires very little bed-in so that one is able to change out the pads and almost immediately able use them to their full potential.

R4 series provides high initial bite for immediate brake response while yielding extremely consistent modulation and predictability. This is great for all road courses, oval track, rally, vintage racing, autocross, club events, and professional driving events. This is one of the best motorsports pads we have used. Available for many applications, so please contact us if you do not see one for your car.

Porterfield R4-1

The R4-1 Vintage Full Race Compound was developed using knowledge testing in the vintage racing community. Optimum uses for the R4-1, under conditions where very high friction is needed with minimal warm up time and in applications where there is difficulty in maintaining sufficient heat with conventional race pad compounds. Widely used on vintage GT and formula cars the R4-1 is also gaining popularity in off-road and rally-cross classes. Great modulation, consistent pedal feedback and rotor friendly at all temperatures as with all the other Porterfield Carbon Kevlar compounds.

Porterfield R4-E

The R4-E Endurance Race Compound is a carbon kevlar compound made to last a bit longer than the original R-4 compound. The R4-E compound is designed to endure higher prolonged temperature and still has pad life as long or longer than Porterfield R-4 do. This pad is great for club enduro events and applications where temperatures are at their maximum.

Porterfield R4-S

Porterfield R4-S high performance street and autocross brake pads are great for heavy-duty street and light track applications. Compound is perfect for everyday use while still keeping the highly capable track ready performance. The R4-S features a high friction level that will increase your stopping power with minimal pedal effort.

The R4-S series pads are VERY VERY rotor friendly and yield very low levels of dust; levels are far below OEM equipment or any other high performance brake pads. Your car will stop better and your wheels will stay cleaner longer. Good for autocross, rallies, driving school, and of course daily driving with a little extra stopping power. R4-S pads are available for virtually all vehicles sold in the US and custom R4-S pad sizes for competition style calipers are also available.

This is one of the very best all around street/strip brake pads available at a great price.

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SKU: 25001937740

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4.6 ★★★★★
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Aziz A
Lexington, US
★★★★★ 3
Black and white
Format: Paperback
Bought this book. Good content. However my copy is in black and white. There are references to colored arrows. I later learned that others have a colored copy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2026
A
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Alexandra Joseph
Battle Creek, US
★★★★★ 5
AMAZING BOOK!!!!!
Format: Paperback
AMAZING BOOK!!!!!! WOW!!! everything you need to know about hemodynamics. This book explains the concepts with graphing, images. It also summarizes the key points. I wish I have read that book sooner. I could not believe it that in 1 book I found all the information I needed for the cardiology boards and my daily practice. Thank you o ugh Dr. Hanna for taking the time to write this book. Much Thanks!!!!
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Reviewed in the United States on September 5, 2020
M
Verified Purchase
Mrs. B.
Natrona Heights, US
★★★★★ 5
A welcome addition to training in hemodynamics
Format: Paperback
Purchased this book for my husband, the director of the Invasive Cardiovascular Technologist Program at a small college. He has been very pleased with the book, calling it a long-overdue addition to the field. It's very helpful in training technologists and others working in Cardiac Cath Labs to recognize hemodynamic waveforms and do calculations. It offers a lot of practice questions in addition to explanations.
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Reviewed in the United States on February 24, 2021
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N. J. Manjarrez
Charlottesville, US
★★★★★ 4
Clear Concise
Format: Paperback
I like the way that this book is laid out. Rather than long drawn out droning chapters it is split into shorter more specific sections. The graphics are plenty big. The case examples and guided questions are useful in reinforcing the knowledge. A good resource for any new CVT or CVT student.
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Reviewed in the United States on April 13, 2013
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Michael Thompson
Houston, US
★★★★★ 5
transformative
Format: Hardcover
In what presents itself as a sequel to his previous HarperOne Publications ( and ), N. T. Wright's newest release challenges theoretical Christianity with the ongoing work of the kingdom, most notably through the oft-debated areas of character and virtue. His own words work best to summarize the book: "Christian life in the present, with its responsibilities and particular callings, is to be understood and shaped in relation to the final goal for which we have been made and redeemed" (ix). That is to say, our lives must reflect the faith to which we cling. But, of course, many Christians are able to live out the goal of their faith; it is a challenge to make certain that our faith is properly aligned and set to the right goal. And that is why this book makes an appropriate trilogy with the previous two, that understanding how Christian faith is about the restoration and rejoining of heaven and earth, and how our lives are meant to reflect that in this present inaugurated eschatology. This book then is about the transformation and dedication of human character as the right response to resurrection. It is about the restored humanity which is now possible, though not without its stumbling and searching, as part of the dawning of God's new day. The opening chapter gives a few examples of admirable behavior, where those who were able to instinctively react heroically in certain situations did so because they had lived in certain ways for years before. In like manner, Wright asserts that Christian character is learned and built (and trained) on a daily basis. What am I here for? Transformation! Not just in our own lives, but as agents of God's Spirit to transform the world. Throughout the book Wright continually points to various character traits which are often regarded as worthwhile and challenges the reader to think of them as transformative for the kingdom. "We've had enough of pragmatists and self-seeking risk-takers. We need people of character" (25). Thus, he believes that character is transformed by three things in particular: 1) aiming at the right goal; 2) figuring the steps to reach that goal; 3) allowing those steps to become habitual (29). He spends a good amount in the second chapter interacting with Aristotle, which may be lost on some people but helps establish his foundation nonetheless. Perhaps one of the most interesting chapters in the book is the third, "Priests and Rulers." It is here that Wright asserts that transformation must include a return to the imago Dei which was set within humanity at Creation. Our proper role in the world is thus "worshipping and reigning" - we are priests and rulers(78-79). He builds this concept on solid biblical footing, and begins to build his perspective on character from here. If this is true, then it is the community of believers which is given over to the twin tasks of holiness and prayer (91). From here, the book follows with the implications of being that sort of community. We are to be a people prepared and presently working for the kingdom (he brings in the beatitudes at this point). Wright also asserts that Christian character is not about rules. Rather, it is about freedom to become what we are intended to be, with the parameters of Scripture given as guides along the journey. We are to be transformed by priestly worship, living and working as people of the kingdom on a moment-by-moment basis (cf. 149). This transformation comes through the renewal of our minds, as our thoughts direct us to a new way of living. The latter chapters acknowledge the difficulty of living in such a way, with Wright asserting that this Spirit-enabled life being possible for us to have in this life. ". . . 'Left to myself, doing what comes naturally, I would fail.' But the point of love is that it doesn't" (183). Love, which Paul repeatedly asserts is the greatest virtue, is the ultimate goal of the believer. Not for self, not even for others . . . but for God alone. If all of our character and virtue are directed to him, then true kingdom work and ministry will happen. Wright includes this as well, "Worship must lead to mission" (225). One could reflect on so much Christian thought at this point. At times Wright's model for character sounds like Brother Lawrence, John Wesley, C. S. Lewis, and many Jesus-Creeders throughout the centuries, among others. It is clear that this is a book written from a lifelong reflection on Christian virtue. While there are a few areas of the book that I could present minor quibbles, I now decide not to do so because the present need for Christian character is so high in our culture that I do not want to give any discouragement for approaching this book - and they are quite minor quibbles indeed. My review and summary is brief and wholly inadequate in capturing the overall journey which is presented in this book. I greatly encourage all Christians to work through this trilogy of faith and action . . . worship and reign.
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Reviewed in the United States on March 23, 2010

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