FITMENT
- 2011-2015.5 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine with a V-Band Clamp.
- Does NOT Fit 2015.5-2016 models equipped with the 3-bolt flange. Please check underneath your truck!
- Please physically inspect underneath your truck to verify your turbo discharge style before purchasing!
DESCRIPTION
Product Overview
- The 6.6L LML suffers from power-robbing DPF regenerations, fail-prone DEF sensors triggering 55 MPH limiters, and EGR gas spiking engine temperatures. Worse, the factory CCV vents oily vapors into the intake, mixing with soot to create thick valve sludge and turbo buildup.
- The LML 5" Delete Kit with Mini Maxx V2 Tuner fixes these issues completely. The pre-loaded tuner clears CEL codes and disables DPF, DEF, and EGR diagnostics, while the 5" pipe, CCV reroute, and EGR bypass lower EGTs, stop intake sludge, eliminate backpressure, and unlock 150+ HP on-the-fly.
Key Features
- Shift-on-the-Fly Performance: Change power settings on-the-fly directly from the cabin display, unlocking additional horsepower and eliminating throttle lag.
- Prevents Oil Sludge: CCV reroute prevents oily vapors from coating intake valves, while EGR delete stops hot gas recirculation to protect engine oil.
- Pre-Loaded Mini Maxx V2 Tuner: Automatically turns off active DPF regenerations, DEF fluid level/heater warnings, and EGR/CCV diagnostics without requiring extra custom files.
- 4-in-1 Delete Package: Removes and disables restrictive DPF filters, DEF/AdBlue urea systems, EGR coolers, and failure-prone CCV reroutes in one order.
FAQ
Q: What is the advantage of a 5-inch Downpipe-Back full pipe system over a DPF-delete race pipe?
A: Downpipe-Back system replaces the entire underbody exhaust section starting directly behind the turbo downpipe flange. This completely eliminates all factory catalytic converters, DPF traps, and mufflers in one continuous, high-flow 5-inch pipe rather than patching into old stock piping.
Q: Does installing a 5-inch downpipe-back exhaust system require removing the factory turbo downpipe?
A: No. A downpipe-back pipe connects directly to the exit flange of your stock turbo downpipe, making installation faster while preserving your stock turbo clamp connection.
Q: Does this 5" Downpipe-Back full pipe fit both Short and Long Bed Duramax trucks?
A: Yes. The exhaust pipe assembly includes a precision intermediate extension pipe. For Short Bed models, you simply trim the extension pipe to the length specified in the manual; for Long Bed or Crew Cab Dually models, you bolt the full extension pipe in place without cutting.
Q: Do I need to unbolt or modify the OEM rubber exhaust hangers on the truck frame?
A: No. The 5-inch downpipe-back pipe features pre-welded, heavy-duty stainless steel hanger rods positioned to slide directly into your truck's factory rubber chassis insulators for a rigid, rattle-free installation.
