PPE PPE 3 Inch Stainless Steel Down Pipe For 2011-2015 GMC/Chevy 6.6L LML Duramax
Fits 2011-2015 6.6L Duramax V8 (LML)
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This PPE down pipe replaces the factory pipe between the turbo and the rest of the exhaust with a smoother, straight 3-inch stainless steel pipe, which the maker says lowers exhaust gas temperature and helps the turbo respond faster.
why this one — PPE's LML down pipe is a direct swap for the stock pipe and only needs a clamp-style connection, which is specific to 2011-2015 trucks before GM changed the flange design in 2016. Worth double-checking your truck is in that window before ordering.
No manufacturer or independent dyno figure found for this product (checked PPE's own listing and Rudy's Performance Parts). Down pipes in this category are marketed on flow and exhaust-gas-temperature improvements, not standalone hp/tq claims.
Fits 2011-2015 LML trucks with the clamp-style exhaust connection only, per the retailer's own fitment note - GM switched to a different flange style partway through the LML's run, so a 2016 LML truck needs a different part, not this one. Sits upstream of the DPF/catalyst, no interaction with DPF/EGR/SCR hardware, so the DPF/EGR/DEF exclusion policy does not apply.
No published gain figure for this part, and nothing here is a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.