Spool Toyota 3RZ Ross Racing Forged Piston

Spool Toyota 3RZ Ross Racing Forged Piston

• Compression Ratio: 9.0:1
• Bore Sizes: +0.5mm
• Pistons come with NPR Gas Nitrided top ring, three pcs. oil
• 0.225” wall Carbon steel
• Forged 2618
• Locks

All of Ross Racing Pistons (since 1985) have been forged from 2618 billet bar stock and have been heat treated and aged to a T61 condition (2618-T61). 2618-T61 is the material that is used when fatigue resistance and durability are of prime importance by all premium racing piston manufacturers.

This material has less than 1% silicon particulate content. High silicon content pistons (forged from 4032 or MS75) will not stand up to the most extreme stress placed on many racing pistons. If a crack starts to form in a high silicon piston it will continue until the piston experiences a catastrophic failure. Simply stated, adding sand to the aluminum only makes it more brittle. In the rare instance of a 2618-T61 piston cracking, the crack will continue to an area where the stress is not as great and will then stop. Another advantage of 2618-T61 over the high silicon pistons is the ability to keep its shape under extreme pressure and high RPM's. "Skirt Shrinking" is not a problem with ROSS Racing Pistons.

Product images are for description purposes only. Actual product may vary.