The MBRP S6291409 is a 4 inch filter-back exhaust for 2017-2026 Ford F-250, F-350 and F-450 Super Duty trucks with the 6.7L Powerstroke. It replaces the factory exhaust behind the diesel particulate filter with a dual split rear exit layout from MBRP's Armor Plus line.

It is built from T409 stainless steel with CNC mandrel-bent tubing that holds a constant 4 inch diameter through every bend. It bolts in at the OEM hanger locations with no welding, and the kit includes the clamps and hardware.

• 4 Inch Mandrel-Bent Tubing: Constant diameter through every bend for smooth flow.
• T409 Stainless Steel: Stainless steel that stands up to salt and weather.
• Bolt-On Install: Uses the OEM hanger locations, no welding required.
• Dual 5 Inch Tips: Two 5 inch OD polished stainless tips, one on each side.
• Complete Kit: Clamps and installation hardware included.

Technical Specifications

• Part Number: S6291409
• Tubing: 4 inch T409 stainless steel
• Type: Filter-back (DPF-back), dual split rear exit
• Tips: Two 5 inch OD single wall T304 stainless
• Includes: Extension pipe, over-axle pipe, Y-pipe, both tailpipes, hanger kit, 4 band clamps
• Series: Armor Plus
• Warranty: Lifetime (per MBRP)
• Core Requirement: No core required

Vehicle Fitment & Technical Installation Notes

• Fitment: 2017-2026 Ford F-250/F-350/F-450 6.7L Powerstroke, all cab and bed configurations. Not for cab and chassis models.
• Installation Tip: Install the Y-pipe and both tailpipes loosely, center the tips at the rear on each side, then tighten the band clamps from front to back.