MCOH3466615 | Interstate Mc-BEE Overhaul Kit (Out of Frame)

Interstate-McBee Caterpillar C15 ACERT Low Compression Overhaul Kit — 16:1 CR (Piston 3466615)

Fits ESN Prefixes: MXS / NXS / BXS / SDP

**NO WARRANTY** OFF HIGHWAY USE ONLY**

Engineered by Interstate-McBee, a trusted American manufacturer with decades of experience in heavy-duty diesel components, this Low Compression Overhaul Kit is designed to convert C15 ACERT engines from the original 18:1 compression ratio to a more durable 16:1 configuration while providing a complete out-of-frame rebuild solution.

Lowering the compression ratio significantly reduces peak cylinder pressures and internal stress — a critical advantage for high-mileage engines operating under heavy loads. The result is enhanced durability, lower operating temperatures, reduced risk of catastrophic failure, and extended engine life in severe-duty applications.

Unlike in-frame kits, this overhaul (out-of-frame) kit includes the necessary components for a full engine rebuild, allowing complete inspection and restoration of internal components to achieve like-new performance and reliability.

This kit is commonly used when converting a Twin Turbo ACERT (compound turbo) system to a Single Turbo configuration, making it the preferred solution for fleets and rebuilders seeking maximum reliability, simplified operation, and reduced long-term maintenance costs.

At the core of this kit are heavy-duty one-piece steel pistons, engineered to withstand extreme combustion forces while delivering superior strength, stability, and long service life compared to traditional multi-piece piston designs.

???? Key Features

✔ 16:1 Low Compression Design
Reduces cylinder pressure, heat, and internal stress for longer engine life

✔ Complete Overhaul (Out-of-Frame) Solution
Full engine rebuild capability for maximum restoration and reliability

✔ Twin Turbo → Single Turbo Conversion Ready
Optimized for de-mandating compound turbo systems

✔ One-Piece Steel Pistons
Superior durability with high resistance to cracking under extreme conditions

✔ Heavy-Duty Performance & Reliability
Manufactured to meet or exceed OEM specifications for demanding applications

 Why Choose Interstate-McBee?

Interstate-McBee is a recognized American brand trusted across the diesel industry for producing high-quality aftermarket engine components. Their products are manufactured with precision engineering, strict quality control, and proven field performance, ensuring dependable results in the most demanding environments.

Unlike generic alternatives, Interstate-McBee kits are built to deliver consistent performance, reduced downtime, and long-term durability, making them a preferred choice for professional engine rebuilders and fleet operators.