OST and JE Piston collaborate - New piston!

[oldeskewltoy]

UPDATE.......

I recently showed this thread to a racer friend of mine and he wasn't kind... asking me if I wanted my friends engines to perform less then perfectly(blow up)... I felt a little shocked, and pretty embarrassed (a bit angry too) and so I asked him what he meant....

oldeskewltoy Wrote:


this set of OST/JE pistons is ready for fitment

He then handed me a STOCK 4AGE piston and asked me to find it on my own..... (ignore the black, look for red)




Not just MY pistons... but ALL aftermarket 4AG pistons suffer from this. Heat LOVES a sharp edge... a simple radius around the valve reliefs will not allow the heat to focus on a flaw and burn the piston.

So... for ALL aftermarket piston users... have your machine shop add a 1/4 round around the valve reliefs and your pistons will survive far longer under SEVERE loads.