These Pistons are custom made for Spool and rated at 900-1000hp by Ross Racing Pistons. Compression Ratio: 9.0:1 Bore Size: +0.5mm Pistons come with NPR Gas Nitrided top ring, three pcs. oil 0.225â€Â wall Carbon steel (upgrade to H13 available) 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.

Read more less

Suits Nissan TB48 Engines Our Nissan TB48 Metal Jacket Harmonic Damper improves on the standard OEM damper, while maintaining all the original accessory pulley diameters, locations and profiles being utilised. 12 TOOTH TRIGGER TYPE BALANCER, PICTURE DISPLAYS NON TRIGGER TYPE Specifications: Rated for 600hp Maintains OEM pulley diameters, locations and profiles Suitable for high-performance street applications Designed and manufactured in-house using CMM, 3D modelling and state of the art CNC technology Bonded using our proprietary Ross Tuffbond process incorporating anti-vibration, anti-tear natural rubber Laser etched 360° timing marks High-quality black finishes Seamless integration with our trigger disc and dry sump drive adaptor Utilises grade 10.9 or better hardware Complies with SFI spec 18.1

Read more less

Ross Metal Jacket Harmonic Damper Suits Nissan TB48 Engines Our Nissan TB48 Metal Jacket Harmonic Damper improves on the standard OEM damper, while maintaining all the original accessory pulley diameters, locations and profiles being utilised. Specifications: Rated for 600hp Maintains OEM pulley diameters, locations and profiles Suitable for high-performance street applications Designed and manufactured in-house using CMM, 3D modelling and state of the art CNC technology Bonded using our proprietary Ross Tuffbond process incorporating anti-vibration, anti-tear natural rubber Laser etched 360° timing marks High-quality black finishes Seamless integration with our trigger disc and dry sump drive adaptor Utilises grade 10.9 or better hardware Complies with SFI spec 18.1

Read more less

Ross Racing Forged Pistons to suit Nissan TB48 These are a custom piston made by Ross for Spool Imports. Pistons are available in: Compression Ratio: 9.0:1 Bore Sizes: +0.5mm Pistons come with rings, gudgeon pins and pin locks Forged 2618 Tool Steel Pins Ross Racing Pistons: All 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.

Read more less