[96 stroker]

I just called advance auto for brake calipers and she asked me if they regular or phernaic? (spelling) what are they?

 

[Cratos]

She was referring to the pistons in the caliper phonic are a plastic like material (blackish) regular are steel

 

[96 stroker]

so i want the steel?

 

[Tom S]

The phenolic where stock on my truck. I think the theory is they transfer less heat to the brake fluid.

 

[bluedge8]

I just went through this last winter, I never got a good answer but I think the phenolic pistons are oe. I think I would be matching both sides first then decide if ford had a good Idea or if the aftermarket knows better.

 

[Peroni]

Phenolic can crack/crumble and I've heard they a a bit more prone to sticking. My original calipers had steel pistons and the new ones also came with steel. I'd rather have steel pushing on the pads than plastic.

 

[Metallitera]

yes phenolic is plactic-ish and is OE. mine are crumbled & cracked and I'll be going with metal replacements.

 

[cadd]

The phenolic where stock on my truck. I think the theory is they transfer less heat to the brake fluid.

This is what I've read also, I don't think it's a big problem using them since that's what ford uses.

Travis

PS
I've been having my share of brake issues all parts from Napa and I think if I had to do it over again I pay the extra and go with Ford stuff.... I'm just thinking my chances of getting sub-par stuff would have been way less....

 

[old man dave]

On my old 460 truck the phenolic pistons were oem, the replacement ones were metal. Under high heat stress, the phenolic pistons tended to crack or stick. The metal ones do not.