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2015+ Shelby GT350 Mustang
Brake pad replacement
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<blockquote data-quote="Tob" data-source="post: 15972628" data-attributes="member: 83412"><p>The 4340MP has a slightly higher tensile strength than the 17-4PH stainless as well as having a higher Rockwell number (hardness). These two images may help.</p><p></p><p>[ATTACH=full]1505980[/ATTACH]</p><p>[ATTACH=full]1505981[/ATTACH]</p><p></p><p>That said, either exceeds the necessary strength to clamp the joint between the Brembo caliper body and the aluminum knuckle. Stainless is typically more expensive but doesn't have to be coated and it is heat treated before machining as opposed to 4340 which is done after. In the end the cost of each is fairly close. Note that the specific 17-4PH alloy studs are used in a number of race applications and isn't just a pretty fastener. The company that manufactures them to Caliperfexion's spec also makes them for a large number of race teams across the spectrum. One of them, for example, is for Multimatic and they in turn use them on a number of cars they build for Ford. The GT4 Mustangs use the same 17-4PH alloy on their front and rear knuckles/calipers...</p><p></p><p>[ATTACH=full]1505982[/ATTACH]</p><p>[ATTACH=full]1505983[/ATTACH]</p><p>[ATTACH=full]1505984[/ATTACH]</p><p></p><p>In other words, either is up to task in this application. It is more a personal preference decision than anything else. Here's a writeup Terrance did a year or so ago on them.</p><p><a href="https://www.svtperformance.com/forums/threads/caliperfexion-gt350-brake-stud-install-other-updates.1131439/" target="_blank">https://www.svtperformance.com/forums/threads/caliperfexion-gt350-brake-stud-install-other-updates.1131439/</a></p><p></p><p></p><p></p><p>There is indeed the potential for a galvanic reaction when two differing materials come in contact with one another along with an electrolyte. Be aware though, that this is happening throughout most any car chassis or suspension. Realistically speaking, I think it fair to assume that most don't drive their GT350 through salt/slush baths in cold winter regions and then park their vehicle without cleaning. Most every joint/fastener begins to corrode at that point on some scale or level.</p><p></p><p>To aid in mitigating the potential for any a reaction at the joint, Caliperfexion supplies a blister pack of ARP thread lubricant. Among other things it does, it protects the A356 aluminum knuckle as well as the 17-4PH stud from any type of corrosion from occurring where the stud makes contact with the knuckle.</p><p></p><p></p><p></p><p></p><p></p><p>You'll be happy you did come time to change pads, I promise you.</p></blockquote><p></p>
[QUOTE="Tob, post: 15972628, member: 83412"] The 4340MP has a slightly higher tensile strength than the 17-4PH stainless as well as having a higher Rockwell number (hardness). These two images may help. [ATTACH=full]1505980[/ATTACH] [ATTACH=full]1505981[/ATTACH] That said, either exceeds the necessary strength to clamp the joint between the Brembo caliper body and the aluminum knuckle. Stainless is typically more expensive but doesn't have to be coated and it is heat treated before machining as opposed to 4340 which is done after. In the end the cost of each is fairly close. Note that the specific 17-4PH alloy studs are used in a number of race applications and isn't just a pretty fastener. The company that manufactures them to Caliperfexion's spec also makes them for a large number of race teams across the spectrum. One of them, for example, is for Multimatic and they in turn use them on a number of cars they build for Ford. The GT4 Mustangs use the same 17-4PH alloy on their front and rear knuckles/calipers... [ATTACH=full]1505982[/ATTACH] [ATTACH=full]1505983[/ATTACH] [ATTACH=full]1505984[/ATTACH] In other words, either is up to task in this application. It is more a personal preference decision than anything else. Here's a writeup Terrance did a year or so ago on them. [URL]https://www.svtperformance.com/forums/threads/caliperfexion-gt350-brake-stud-install-other-updates.1131439/[/URL] There is indeed the potential for a galvanic reaction when two differing materials come in contact with one another along with an electrolyte. Be aware though, that this is happening throughout most any car chassis or suspension. Realistically speaking, I think it fair to assume that most don't drive their GT350 through salt/slush baths in cold winter regions and then park their vehicle without cleaning. Most every joint/fastener begins to corrode at that point on some scale or level. To aid in mitigating the potential for any a reaction at the joint, Caliperfexion supplies a blister pack of ARP thread lubricant. Among other things it does, it protects the A356 aluminum knuckle as well as the 17-4PH stud from any type of corrosion from occurring where the stud makes contact with the knuckle. You'll be happy you did come time to change pads, I promise you. [/QUOTE]
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Brake pad replacement
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