FITMENT
- 2010-Present Cummins Volvo, Peterbilt, Mack, International, Freightliner, Kenworth with the ISX15 CM2250 / CM2350 engines.
DESCRIPTION
Product Overview
- Sticking EGR valves, severe soot coking, and internal cooler failures cause excessive maintenance downtime and costly repairs on Cummins ISX15 CM2250 and CM2350 engines. Standard Stage 1 block-offs only cover surface ports, leaving internal cooler passages vulnerable to residual leaks and pressure loss.
- Fully secure your engine’s top end with this heavy-duty ISX15 Stage 2 EGR Plug Kit. Designed to completely seal off all EGR valve, crossover, and cooler passages after component removal, this kit eliminates internal coolant leak risks, prevents boost/exhaust leaks, and delivers long-term reliability for demanding long-haul applications.
Key Features
- Combines anodized, CNC precision-machined surfaces for flat, corrosion-resistant sealing across every intake passage.
- Shields the engine and drops EGTs by keeping sticky carbon soot off the intake valves and stopping coolant from reaching the cylinder walls.
- Seals both the EGR valve and EGR cooler ports completely with precision block plates and high-pressure threaded plug fittings.
- Suits turbo-delete conversions, making it the go-to choice for trucks running a non-VGT aftermarket turbo or a full emissions-bypass setup.
FAQ
Q: What’s the point of installing an EGR block-off plug kit?
A: Once the EGR hardware comes out, the leftover exhaust and coolant passages have to be sealed off. The kit supplies block plates, plugs, and gaskets to stop exhaust leaks, coolant leaks, and contamination from any open EGR connection.
Q: Are CM2250 and CM2350 EGR kits interchangeable?
A: Cummins kept the flange patterns and EGR cooler mounting points nearly identical between the CM2250 and CM2350 generations. For standard block-off and sealing hardware — the plates, threaded plugs, and gaskets used to close the EGR valve and cooler ports — most kits are cross-compatible.
Q: Why does sealing matter so much after the EGR is removed?
A: A proper seal closes off open exhaust and coolant passages, which keeps the engine bay clean and cuts down on potential leaks and contamination problems.
Q: Will this block-off plate need custom ECM tuning?
A: Yes. The moment you physically block EGR flow at the intake manifold, the factory ECM reads a shift in manifold pressure and airflow, which trips a CEL and can push the engine into limp mode. Custom ECM delete tuning is required to switch off the EGR sensor logic.
