iWARNING: Products on this page can expose you to a chemical, which is known to the St ate of California to cause cancer or reproductive harm. **For more information go to www.P65Warnings.ca.gov**22PISTONS - NON-GMCLARKS offers 4 CHOICES of pistons, all with new wrist pins. For more information read below and on pages 21 & 23. If you order an oversize piston you must use oversized RINGS (pg. 24) and CYLINDERS (pgs. 23B-23C). All CLARK pistons take regular Corvair rings - not all pistons on the market do.PREMIUM CAST: BETTER than the cast pistons that originally came in all Corvairs.HI-TECH: High performance pistons cast with higher silicon alloys and precision machined, approaching the standards of forged pistons using today's casting technology.F0RGED: The highest performance pistons, aluminum is denser than cast due to being forged (pressure stamped to shape). CLARK FORGED: Precision forged & machined Sealed Power(R) Forged: New generation of old TRW forged. NOTES: 1 - ALL PISTONS in an engine SHOULD BE THE SAME. 2 - 1960: Check "NOS" on website OR switch to 1961-63 cylinders & pistons which will fit a 1960 engine.CYLINDER/PISTON/RING SETS: See page 23C PISTONSPart Numbers for JUST PISTONS - Sold each with wrist pinALL 1 Lb. STANDARD +20 +30 +40 +601961-63 PREMIUM CAST C1435-STD C1435+20 C1435+30 C1435+40 C1435+601964-69 PREMIUM CAST C6050 C6051+20 C6052+30 C6053+40 C6054+601964-69 HI-TECH C1436H-STD C1436H+20 C1436H+30 C1436H+40 C1436H+601964-69 Clark FORGED C3901-STD C3901+20 C3901+30 C3901+40 C3901+ 601964-69 Sealed Power(R) FORGED C1436-STD C1436+20 C1436+30 C1436+40 C1436+60Guarantee?? Yes!!PREMIUM CAST are guaranteed for 1 yearHI-TECH are guaranteed for 2 yearsSEALED POWER(R) FORGED are guaranteed for 90 daysCLARK FORGED are guaranteed for 2 yearsThis guarantee, to the original purchaser, covers defects in workmanship and material when correctly installed, not abused and not used for racing applications. Total guarantee will be replacement or refund of the original cost of the piston (your choice) upon our inspection of pistons. You may also have other rights, which vary from state to state.ENGINE DISCOUNT !see Blue pg. MK-2Which PISTONS should I buy? - PISTON SUMMARY - See page 23 for more info PREMIUM CAST: These are a current technology upgrade of the original pistons. PREMIUM CAST have a 1 year guarantee (see bottom of this page). They are so exact that the standard size can be mixed with original pistons. They are a good economical choice for all Corvair engines. However, we do suggest you upgrade for the following engines/situations to the HI-TECH OR FORGED pistons: A. ALL 140 & TURBO (that will be "RUN HARD") B. Engines used in "severe service" - towing, motor home, desert use or "RUN HARD".HI-TECH: These are a true HI-PERFORMANCE PISTON (heavy duty). Someone with a 95-11OHP can certainly use them for complete "peace of mind" but they are mainly suggested for Turbo, 140 and other high performance applications. They have been engineered and manufactured to approach the standards of forged pistons using today's advanced casting technology. HI-TECH pistons have a 2 year guarantee (see bottom of this page).F0RGED: Superior strength & stability for demanding owners. What makes forged pistons the best you can buy? Forging makes the aluminum denser so it is much stronger and can withstand higher heat levels. The denser aluminum also allows for more accurate machining and more identical weights between pistons. We offer both Sealed Power forged pistons (when available) and Clark Forged pistons. Both forged pistons have a moly-graphite coating on the skirts for a decrease in scuffing and wear-especially on start up. See page 23 for more on Clark Forged pistons.Clark Hi-TechCLARK PREMIUM CASTSealed Power Forged Clark Forged