2026 Dynamax DynaQuest XL for Sale

The DynaQuest XL is the top of the Dynamax range and the most extreme Super C the brand builds. It rides on the heavy-duty Freightliner M2-112 PLUS chassis rated at 33,000 lb GVWR and a 54,000 lb GCWR, with a Cummins L9 turbo-diesel turned up to 450 horsepower and 1,250 lb-ft of torque, an Allison 3200 TRV six-speed automatic, air brakes, and air-ride suspension — the most capable powertrain and tow rating in the lineup, comfortably handling a large enclosed trailer or multiple vehicles. On top sits Dynamax's most lavish coach: full-body paint, opposing slides, residential cabinetry and solid-surface counters, a king bed, theater seating, fireplace, large galley, and Aqua-Hot-style heating, across five floor plans (3200KD, 3400KD, 3700BD, 3700RB, 3801TS) spanning roughly 34 to 41 feet. On RV Insider it carries a 4.1 rating over a small two-review sample, so we lean on the brand-level 4.0 and the strong drivability reputation. The honest caution is the obvious one — this is a $500,000-and-up diesel coach that demands commercial service, fuel, tires, and parking, plus the brand's slower factory-warranty turnaround. For a buyer who wants the no-compromise flagship Super C with the most power and the most luxury, the DynaQuest XL is the pick.

Looking for a Dynamax DynaQuest XL for sale?

You're in the right place. We don't sell the DynaQuest XL off a lot — we work for you, find the cleanest one on the market new or used, inspect it, and negotiate it. Below is everything you need to know before you shop: the real specs, every floor plan, the photos, what it tends to sell for, and a straight read on what owners love and what they grumble about.