has anyone used these or know if they are good?
or what piston would u recommend for a 331?

 

Mahle are good pistons but they are a little pricey. Probe Industries are good pistons too. What are you doing with the car, keith black pistons aren't bad and are affordable.

 

I have Mahle's in mine, they are VERY good quality, very strong, and very light weight. However, a piston/ring package starts at around $600 and just goes up. It depends on what you wanna do. If you wanna use boost/spray and not have to worry about pistons(as long as you don't detonate and fry them that is) then Mahle's, or others are good. For a mild budget build they may be waymore than you need. They are a good weight saving piston though. I'm running SBC stroker pistons and 5.7" Scat SBC rods though, so the piston/pin setupI'm usingis 85g lighter than the Ford 5.09 rod pistons also from Mahle

 

mahle pistons are amazing! they are manufactured in germany. they make pistons for ferrari and various other high performance including Formula 1 cars.
my dad was just there... so i got a nice ferrari piston. lol good stuff. i'm going to get them when i rebuild my engine

 

Like I said, VERY good quality. They know how to make a good piston

 

thanx for the info. im planning on doin an NA 331 with Scat forged crank and H-beam rods, not sure on if i wanna spray tho. ill prolly end up goin wit the mahle pistons even tho they are pricey.

 

If you're going with a forged crank/rods might as well get really good pistons like the Mahles, then if you do go spray you don't have to worry about a flimsy piston. You'll need a ring filer though, all their piston ring packs are file to fit, and make sure if you plan on doing boost or nitrous that you give them enough gap

 

If money is not an issue you could go with these. They are excellent.

http://www.diamondracing.net/home.asp

 

When you're ready, I can get you the everything in kit form and it will save you quite a bit of money. I sell Scat and offer several different brands of pistons as upgrades including Mahle.

 

also how do i decide whether i need flat top, dished, or dome pistons?? i would like to run on pump gas