FITMENT
- 2007-2010 Cummins Volvo, Peterbilt, Mack, International, Freightliner, Kenworth with the ISX CM871 Engines.
DESCRIPTION
Product Overview
-
Built for heavy-duty commercial service, the 2007–2010 Cummins ISX CM871 operates under extreme thermal stress that degrades factory emissions hardware over time. Recirculated soot rapidly builds up inside crossover passages, causing EGR valves to stick, intake passages to choke, and internal cooler cores to fail—introducing severe airflow restrictions and risking internal coolant leaks.
- Purpose-built for off-road and competition applications, this Stage 2 EGR Block Plate & Plug Kit delivers a comprehensive sealing solution following component removal. By precision-capping all corresponding exhaust, intake, and coolant ports, it permanently prevents high-pressure exhaust gases from re-entering the intake stream, isolates the cooling circuit, and ensures maximum manifold sealing integrity under heavy-haul demands.
Key Features
- Crafted from CNC-machined aluminum with robust 304 stainless steel plates and hardware, ensuring superior structural strength and high-thermal resistance.
- Ensures a secure, precision seal on all remaining EGR ports to prevent post-removal fluid leaks and systemic contamination.
- Blocks exhaust gas recirculation into the intake tract, preventing carbon buildup and maintaining smooth, uninterrupted airflow.
- Completely isolates EGR valve and cooler passages following delete operations, effectively blocking bypass exhaust flow and coolant losses.
FAQ
Q: What’s the difference between Stage 1 and Stage 2 EGR block-off kits?
A: A Stage 1 kit typically addresses a single port — usually the EGR valve mounting face. This Stage 2 kit provides a comprehensive sealing approach with four plates, plug fittings, and gaskets that cover the EGR valve port, exhaust gas crossover, and both coolant circuit connections. More ports sealed means fewer potential leak paths.
Q: What happens if I pull the EGR components but don’t seal the ports?
A: Open ports become exhaust leaks, coolant leaks, or both — depending on which passage you left unsealed. Exhaust gas escaping from an open EGR crossover cooks nearby wiring, sensors, and rubber components. An unplugged coolant passage drains your cooling system. Properly installed block plates and plugs are not optional.
Q: Is this kit compatible with my CM870 ISX engine?
A: No. The CM870 and CM871 ISX engines use different EGR system layouts, port dimensions, and mounting patterns. If you’re running a 2002–2007 CM870, use Seguler’s CM870 Stage 2 EGR Plug Kit instead.
Q: What real-world benefits does a properly sealed EGR delete provide for a working ISX?
A: Beyond the obvious — no more recirculated soot in the intake — a fully sealed EGR system removal protects surrounding components from exhaust and coolant leaks, supports cleaner intake airflow, and eliminates the EGR cooler as a potential source of internal coolant loss that can go undetected until it causes major engine damage. For a fleet truck, that means fewer unscheduled shop visits and more miles between major services.
