Sale

Diamond Pistons

Forged Dish Piston Kit, 4.065" Bore

$1,549.99 $1,472.49 Save $77.50

SKU: 21603-RS-8

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Diamond Pistons Piston Kit is engineered for Chevrolet Gen V LT1/LT4 engines, offering a robust upgrade for performance applications. This kit is built with precision, featuring a 4.065" bore, 3.622" stroke, and a 6.125" rod length. The DISH-style pistons have a volume of 10.0cc and a compression height of 1.304", ensuring optimal performance. Key features of this piston kit include forced pin oilers for enhanced lubrication, moly-coated skirts to reduce friction and wear, and 3D pockets inboard for improved valve clearance and combustion efficiency. The kit also includes standard pins, locks, and support rails where required, simplifying installation. Diamond Racing Products, founded in 1968, has a long history of innovation in racing piston design. Whether for drag racing or other demanding applications, these pistons are built to withstand the rigors of high-performance engines.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandDiamond Pistons
Part Number21603-RS-8
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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