Those are .040" 347 pistons, not factory 302 replacements. BUT, that said, they are NICE pistons!! Thermal coating (standard), anti-friction coating on the skirts (standard), 1.5-1.5-3mm low drag rings (standard...and they are worth quite a bit of HP over standard tension rings!!). I have run 2 sets of them, both 414" windsors. Light, strong, come with rings, thermal coating, anti-friction coatings, etc. They also use round wire locks which are a thousand times easier to install than spirolox...and a million times easier to take out if you have to. The price is steep on them, but remember that price includes rings. Would I buy another set? You betchya! I am going to be working on the spare engine soon...going to be another 414" (4.000 stroke, 4.062 bore windsor), concreted C9OE block (cast on christmas day 1969), etc. This one's going to use 6.300" H beam rods and 1.165" compresion height Mahle pistons. The current 414 I am running now is running 6.250 rods and 1.245 pistons, but with the early block's 9.48 deck I will have to use a shorter stack height (rod length + piston CH + 1/2 stroke). The one in the car now went together nicely....those little rings helped a bunch. It took less than 8 lb-ft to turn the crankshaft (short block). I could turn it by hand.
mavman thanks for the positive feedback and i appreciate that fact that you have hell of lot of knowledge on these parts. I don't know what the hell happened to my srp pistons but when i bought my kit the guy told me that they were good parts.
SRPs aren't bad! I used them frequently in both street and race applications. I just prefer the Mahle pistons now but they are more expensive. For the money spent, the SRPs are hard to beat!
