Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

Important Note Regarding Nitrous & Pressurised Systems

Orders containing nitrous systems or other pressurised canisters may require additional handling and inspection prior to dispatch.

Due to the nature of these products and applicable transport and state regulations, each system is individually inspected, released, and purged where required to ensure compliance with air and road freight standards. While most orders ship within our normal timeframes, this process may occasionally result in slightly longer dispatch times than those advertised.

We do everything we can to minimise delays, and the vast majority of shipments move through without issue. If you are working to a tight deadline or require urgent delivery, please contact us prior to placing your order so we can confirm the most suitable options.

We appreciate your understanding and patience - this process ensures safe, compliant transport and delivery of your order.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Reference Information

350/400 23° 4.125B/1.200CD/Kit

Diamond Pistons offers 23 degree Nitrous Dome Series pistons for a variety of applications, including many Chevy small block Gen I engines from 1968 and up. The forged 2618 aluminum dome-style pistons with two valve reliefs are available in a variety of bore and stroke sizes, rod lengths, compression heights, head volumes, and ring thicknesses. They're available individually or in sets of 8.

Additional product details:
• Forced pin oilers from the oil ring
• Pin fitted
• Vertical gas ports
• 3-D dome and pockets
• Designed for nitrous applications
• H-13 pins, locks and support rails (if required) included