Diamond Eye Performance 4in 409 Stainless Dual DPF-Back Exhaust, Crew Cab Short Box (Ram 2500 Only) [K4260S]
Fits 2013-2018 6.7L Cummins I6
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Price tracked 7 times since Jul 26, 2026: low $626.29, high $637.87, currently $626.29.
Requires: RAM 2500 CREW CAB / SHORT BOX ONLY per the source listing title "13-18 Ram 6.7L Cummins 2500 CC/SB". Ram 3500 fitment is NOT confirmed for this SKU. Other cab/bed combinations require a different Diamond Eye part number.
where to buy · 2 retailers tracked
A DPF-back exhaust is the diesel equivalent of a cat-back: it replaces everything from the factory diesel particulate filter rearward while leaving the DPF and catalyst fully in place, so it stays emissions-legal.
why this one — Diamond Eye is a well-known DPF-back specialist and this dual-outlet 409-stainless kit is purpose-fit to the 2013-2018 Crew Cab Short Box 6.7L Cummins - one of the best-documented model/cab/bed combos for this era.
No manufacturer-published hp/tq figure found for this DPF-back exhaust.
Questions about this category
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 our affiliate disclosure.