Originally posted by gpzilla
KB's are a pain. Take the ring end gap extremely seriously. If not enough gap - you will be buying a new engine. KB's have high silicone content and move heat better. If your motor is just stock, stick with OEM cast. KB's are still cast, just high silicone. I'm not kidding about the ring end gap, if it's not enough, and the compression ring butts, you'll be picking pieces of pistons, and rings out of your heads, and oil pan, if you don't throw a rod through the block.

The Plymouth Prowler uses KB's - I've seen those fail - ELD Performance pulled a set of them out of a Prowler V6 that got too hot and butted the compression rings. I trashed my motor with a set a KB's dont' really know what they're good for excpet taking your money. Go with an OEM cast if you're gonna stick with cast. Don't forget to get your crank balanced, because you are changing the weight of the rotating assembly. One ounce (28 grams) out of balance at 4000 RPM is equal to 24 pounds of out of balance.

I just put aluminum forged 6 inch rods in my 350 and lightened the entire rotating assembly by about 5 pounds.

I'm running forged aluminum pistons.
SOUNDS TO ME LIKE SOMEONE DID NOT FILE FIT, FILE FIT PISTON RINGS.