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Engines and Components› Pistons and Piston Rings

DSS Racing

DSS Racing FX-Series Forged Piston Set 4.070" Bore

$1,092.10 $1,090.98 Save $1.12

SKU: K3-6303-4070

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Overview

The DSS Racing K3-6303-4070 is a forged piston and ring kit from the FX-Series line, designed for Chrysler Small Block Mopar engines. Constructed from 2618 Alloy, these pistons feature a dish top with a -16.00cc volume and a bore size of 4.070 inches. The kit includes XR wrist pins and is engineered for optimal performance and durability.

These pistons are suitable for stroker engines, with an advanced skirt design that enhances stability and ring seal for quieter operation. The deep CNC valve reliefs accommodate more aggressive camshafts and cylinder head combinations, enabling higher horsepower potential. The compression height is 1.802 inches, and the pin diameter is 0.984 inches.
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The DSS Racing K3-6303-4070 is a forged piston and ring kit from the FX-Series line, designed for Chrysler Small Block Mopar engines. Constructed from 2618 Alloy, these pistons feature a dish top with a -16.00cc volume and a bore size of 4.070 inches. The kit includes XR wrist pins and is engineered for optimal performance and durability. These pistons are suitable for stroker engines, with an advanced skirt design that enhances stability and ring seal for quieter operation. The deep CNC valve reliefs accommodate more aggressive camshafts and cylinder head combinations, enabling higher horsepower potential. The compression height is 1.802 inches, and the pin diameter is 0.984 inches.

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.

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Specifications

BrandDSS Racing
Part NumberK3-6303-4070
CategoryEngines and Components

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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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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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