Diamond Pistons LT2K Series 21603-RS-8 Pistons, Flat Top, Series, Forged Aluminum, 4.065 in. Bore, +10.00cc Head Volume, Chevy, LT1/LT4, Set of 8
Diamond Pistons LT2K Series 21603-RS-8 Pistons, Flat Top, Series, Forged Aluminum, 4.065 in. Bore, +10.00cc Head Volume, Chevy, LT1/LT4, Set of 8
A$3,446.37
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-07 19:54:38
Features
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.
(keyword: pistons)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.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Diamond Pistons, Diamond Racing Products |
| StreetFX SKU | dpp21603-RS-8 |
| SFX Item ID | 5525431 |
| Accounting SKU | dpp-21603-RS-8 |
| Manufacturer SKU | 21603-RS-8 |
| Manufacturer UPC | 193564389091 |
| Alternative References | 21603-RS-8, DPP-21603-RS-8 |
Pistons, Flat Top, LT2K Series, Forged Aluminum, 4.065 in. Bore, +10.00cc Head Volume, Chevy, LT1/LT4, Set of 8
Diamond Pistons LT2K Series flat top pistons are forged from 2618 aluminum allow for high HP-NOS-Boost applications rated up to 2,000 hp. They're available in a variety of bore sizes.
Here are some details and specs:
• 3-D milling on piston crowns for ready to install finish
• Inboard forging design with fully machined under crown for maximum strength
• Valve pockets designed to work with most aftermarket 15 degree cylinder heads
• Side gas ports for better ring seal
• Moly skirt coating for friction loss and skirt wear protection
• Top ring down dimension: 0.300 in. (1.304cd) 0.250 in. (1.053cd)
• Ratios figured for 0.053 head gasket
• Premium 1.5mm x 1.5mm x 3.0mm ring package included
• Premium H-13 0.250W wrist pins included chamfered for round wire locks
• Valve pocket depth: 0.200 in. intake and 0.145 in. exhaust
| Product Attributes | |
|---|---|
| Brand | Diamond Pistons |
| Manufacturer's Part Number | 21603-RS-8 |
| Part Type | Pistons |
| Product Line | Diamond Pistons LT2K Series Pistons |
| UPC | 193564389091 |
| Piston Rings Included | Yes |
| Bore (in.) | 4.065 in. |
| Bore (mm) | 103.251mm |
| Stroke | 3.622 in. |
| Engine Stroke Type | Stock |
| Actual Engine Displacement | 6.2L/376 |
| Rod Length | 6.125 in. |
| Piston Style | Flat top, with two valve reliefs |
| Piston Material | Forged aluminum |
| Compression Height (in.) | 1.304 in. |
| Piston Head Volume (cc) | +10.00cc |
| Wrist Pin Style | Press-fit or floating |
| Wrist Pin Retainers Included | Yes |
| Wrist Pin Included | Yes |
| Pin Diameter (in.) | 0.927 in. |
| Piston Ring Thickness | 1.50mm x 1.50mm x 3.00mm |
| File Fit | Yes |
| Gapless | No |
| Top Ring Thickness | 1.5mm |
| Top Ring Material | Stainless steel |
| Top Ring Facing Material | PVD |
| Second Ring Thickness | 1.5mm |
| Second Ring Material | Ductile iron |
| Second Ring Facing Material | Phosphate coated |
| Oil Ring Thickness | 3.0mm |
| Oil Ring Material | Steel |
| Oil Ring Tension | Standard |
| Remanufactured | No |
| Quantity | Sold as a set of 8. |
Compatibility
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