I will keep it short. I am rebuilding my engine and want to know if there is an aftermarket option for frm safe pistons (so I dont have to sleeve the block)? I have been looking for weeks and cant seem to find any answers to the question. I believe that Mahle has an option but I cant find a part number for them to see if I can get them through my work (Advance Auto Parts). If anyone can shed some light on this it would be greatly appreciated.

 

J's, Spoon, and Toda all make FRM friendly pistons.

 

Aren't these non-forged pistons?
Nevertheless, I've not heard of any damaged machined piston due to the manufacturing process yet. And machined pistons are a little lighter than forged.
BTW what makes pistons "FRM-Friendly"?

 

Let us know if you find a Mahle F20 piston. I used their H22 pistons in a F24 stroker. They have a gold coloured coating on the skirt that looks like a non-stick frypan coating.

The H22 ones have a different compression height and pin size, plus the valve cutouts are in a different position.

Pictures of the Mahle ones are in my F24 post/

F24 stroker

 

The only company is Mahle but not sure if they make a F specific piston. All the other companies such as spoon use an OEM piston.

 

great looks like Honda is going to get even more of my F'in money (b@st@rds).

 

Todas are FRM friendly.

Spoon and Js are simply OEM with better weight balance. They buy a lot of OEM and weight them individually and group them into 4s with as little variance as possible.

 

well although i would love to build the motor with Toda's I dont have that kinda money. I forgot to put in my first post BUDGET.

 

Wrong car for a budget imo

 

Yeah, but pistons are about the same price for most cars. Its just the FRM that makes things complicated. The rods, bolts, and bearings are about the same price as other cars. Good luck man. Call up a Malhe dealer and order some of theirs. If you are performance minded and are re-building the engine anyways. Do it the right way, with quality parts. Remember though, if you change the compression ratio then you will need some sort of tune.