Just like the topic says, I'm wondering If Honda's pistons are cast or forged? I'm building an ls/vtec turbo with 350-400hp as my goal, I like the compression of 9.5:1 which it already has. I just bought new eagle h-bead rods, and was wondering if the stock pistons are worth keeping? Thanks

 

Don't waste your time with stock pistons at that power level. They're cast, and have very weak ringlands.

 

no, they're cast, and not worth keeping

 

Okay if they are not worth keeping, then I would have to break in the motor correct? If I remember it's 500-1000 miles of 4000k or less, and changing the oil 2/3 times in that period?

 

The motor in my currently daily driver (95 GSR) was broke in on a Dynapack. 15 minutes of idle, change oil and filter, and hit the dyno. Runs great with perfect compression and very low leakdown, I don't believe in easy break-ins anymore.