Cummins 4BTA Engine Parts - Piston Kit Section

Piston Kits for Cummins 4BTA Engines

The Cummins 4BTA is a turbocharged 3.9-liter four-cylinder diesel engine renowned for its performance in marine propulsion, stationary power, and industrial equipment. At Diesel Pro Power, we provide OEM-quality piston kits for the Cummins 4BTA that are engineered for durability, thermal stability, and peak combustion efficiency—backed by support for a wide range of CPL numbers.

CPL Compatibility and Engine Coverage

All Cummins piston kits must match your engine’s CPL (Control Parts List) to ensure proper fitment and compression characteristics. Our 4BTA piston kits are designed to accommodate various CPL configurations, supporting both standard and turbocharged versions of the engine across numerous applications.

Compression Ratio Options for Cummins 4BTA Pistons

15.3:1 Compression Ratio Piston Kits

The 15.3:1 compression ratio piston kit is ideal for 4BTA engines in continuous-load conditions where slightly reduced cylinder pressures promote cooler operation and extended service life. Recommended for CPLs such as:

• 1975, 2197, 2205, 2208, 2956, 8104, 8457

This piston configuration helps manage engine temperatures in applications such as auxiliary marine generators and stationary power units.

16.5:1 Compression Ratio Piston Kits

An excellent mid-range compression option for turbocharged 4BTA engines used in dynamic-duty environments. The 16.5:1 ratio offers improved combustion stability without significantly increasing peak cylinder pressures. CPLs supported include:

• 594, 595, 599, 600, 696, 698, 710, 713, 715, 741, 742, 792, 793, 826, 834, 912, 937, 940, 961, 962, 983, 998, 1173, 1174, 1209, 1278, 1518, 1520, 1523, 1524, 1525, 1581, 2050, 2377, 2530, 2891, 8206

These pistons perform well in turbocharged setups demanding balance between torque and thermal efficiency.

17.3:1 Compression Ratio Piston Kits

This piston kit is built for higher cylinder pressure and maximum combustion efficiency, making it ideal for heavy-load 4BTA applications in marine and industrial settings. Common CPL matches include:

• 591, 596, 681, 691, 714, 721, 725, 791, 802, 843, 845, 895, 960, 981, 999, 1172, 1259, 1312, 1320, 1403, 1433, 1522, 1608, 1932

If your 4BTA engine is tasked with powering propulsion systems or high-demand industrial machinery, this ratio provides the necessary output without compromise.

17.5:1 Compression Ratio Piston Kits

The most aggressive compression ratio available for the Cummins 4BTA engine. These pistons support full combustion efficiency and strong fuel atomization under high-pressure turbocharged operation. Two large CPL groups are covered:

Primary CPLs:

• 953, 970, 1165, 1247, 1313, 1322, 1408, 1570, 1613, 1638, 1928

Extended CPL Range:

• 597, 690, 692, 712, 716, 727, 729, 730, 761, 762, 763, 804, 807, 817, 856, 857, 858, 938, 943, 947, 948, 949, 950, 971, 994, 1160, 1163, 1168, 1189, 1201, 1202, 1207, 1209, 1245, 1246, 1266, 1268, 1277, 1279, 1287, 1288, 1289, 1440, 1508, 1554, 1601, 1627, 1631, 1659, 1685, 2021, 2049, 2272, 2273, 2340, 2413, 2414

Use this piston configuration in marine propulsion systems and turbocharged diesel applications requiring peak torque and power under load.

Standard Piston Kits (Universal Fitment)

These piston kits do not emphasize a specific compression ratio and are suitable for rebuilders working with a wide CPL range or uncertain engine configurations. These provide OEM-equivalent piston and pin sets that are tested across multiple Cummins applications. Supported CPLs include:

• 1965, 1966, 1967, 2109, 2144, 2302, 2351, 2359, 2396, 2478, 2623, 8442, 1071, 1961, 1962, 2242, 2296, 2372, 2373, 2417, 2551, 2868, 3868, 1902, 1948, 2014, 2015, 2016, 2071, 2122, 2125, 2292, 8444

• 1551, 1552, 1553, 1744, 1839, 1914, 1915, 1916, 2000, 2001, 2013, 2023, 2175, 2195, 2243, 2249, 2252, 2253, 2347, 2348, 2375, 3219

These are the best choice for standard top-end refreshes or rebuilds where OEM compatibility is essential.

Supporting Components for Cummins 4BTA Pistons

Salvage Sleeves

Used to restore worn cylinder bores to original specifications without replacing the engine block. These sleeves are:

• Designed for Cummins 4BTA, 4BT, 6B, 6BT, ISB, and QSB engines

• Ideal for rebuilders dealing with scored or oversized bores

• Machined to fit factory specifications

Sleeves are essential for cost-effective engine restorations and are compatible with standard piston kits.

Piston Ring Sets for Cummins 4BTA

Diesel Pro offers a selection of piston ring sets tailored to specific piston designs. All ring sets are precision-engineered for high-sealing performance, low oil consumption, and resistance to blow-by. Options include:

• Standard Ring Sets: Reliable replacements for most 4BTA piston styles

• 8MM TRL Ring Sets: Thicker ring designs suited for high-stress turbocharged combustion cycles

• Type E Ring Sets: Designed for specific piston models requiring exact groove compatibility

Choose the ring set that matches your piston kit or CPL for optimized engine sealing and oil control.

Why Diesel Pro Power Is the Preferred Source for 4BTA Piston Kits

• Over 40,000 satisfied customers worldwide

• Piston kits designed for marine, industrial, and power generation uses

• Fast shipping with global reach

• In-house technical expertise for CPL matching and piston selection

• Inventory stocked for both standard and high-compression configurations

• Trusted by rebuilders, mechanics, and marine engineers globally

Our kits are trusted in marine propulsion, heavy equipment, generator sets, and more.

Common Uses for Cummins 4BTA Engines and Pistons

Diesel Pro Power supplies 4BTA piston kits for applications such as:

• Marine diesel propulsion and auxiliary engines

• Turbocharged generators for continuous power

• Agricultural and construction equipment with high-output requirements

• Stationary diesel engines in industrial plants

• Skid-mounted and mobile power platforms

Each piston kit is engineered to meet the demands of turbocharged diesel environments, ensuring maximum uptime and reliability.