250 CHEVY Performance Flat Top piston set 5.7 rod and Long Rod 292 2
12Bolt's KA HYPEREUTECTIC flat top piston.
Best piston/ ring combo you can buy for stock - performance rebuild. These pistons are custom made for 12Bolt to be used in your rodded 250.
Specs:
CH 1.67
Rings 1.5/1.5/3.0 file fit
Weight Piston 625, Pin 105, rings 32.5
Piston to wall clearance .002
Also used with the Billet Long Rod 292 7.130 LENGTH
Included are:
6 PISTONS
6 Pins
1 set of Premium low friction rings Plasma Molly File fit to .020-.022
Spirolocs if used on floating rods
Applications include:
-Naturally aspirated
The compression height of the piston is made so that only .015 is needed to be milled from the deck of engine to "Zero Deck" the engine. Stock pistons require .030-.035 to zero deck which also weakens the deck.
You will receive 6 new pistons, pins, spirolocs, and full ring set.
True Flat top design.
These pistons in a 250 will provide a 9.77 compression ratio with a 70CC chamber, most chambers will measure close to 74CC and give a 9.44CR
A 292 will see 11.4 CR with a 70CC head
Can also be used on pressed rods. Stock type.
250 5.7 rod
292 with billet long rod 7.130 long
These are marked as 23 LBs only to be able to ship as a insured package.