The aFe Power 49-43003 (Mach Force-XP Series) is a premium 4-inch mandrel-bent cat-back single-exit exhaust system engineered for 2003–2007 Ford F-250 and F-350 Super Duty trucks equipped with the 6.0L Powerstroke diesel engine. Constructed entirely from durable 409 stainless steel tubing, this system bolts directly behind the factory catalytic converter to maintain 50-state emissions compliance while drastically opening up exhaust flow. aFe Power outfits this kit with a high-flow, straight-through 24-inch stainless steel performance muffler, heavy-duty OE-style bayonet hangers that mount into factory chassis isolators, and a massive 5-inch angle-cut, dual-walled polished 304 stainless steel exhaust tip featuring a laser-etched aFe Power logo.

Excessive exhaust gas temperatures (EGTs) while towing, restrictive factory 3.5-inch tubing, power-robbing internal muffler baffles, suppressed variable-geometry turbo sound, and rotted aluminized tailpipes caused by road salt and moisture are what this system cures. The factory Ford exhaust system chokes flow behind the catalytic converter with crimped bends and a restrictive OEM chambered muffler, trapping thermal energy under heavy pulling. The aFe Mach Force-XP system increases exhaust flow by up to 43%, delivering faster turbo spool, reduced EGTs, and the distinct, aggressive 6.0L Powerstroke exhaust note without introducing annoying in-cab highway drone. It is a complete 4-inch cat-back exhaust system including the intermediate extension pipes, performance muffler, over-axle pipe, tailpipe, 5-inch polished tip, and OE-style band clamps; turbo downpipes and catalytic converter delete pipes are sold separately.

It fits 2003–2007 Ford F-250 and F-350 Super Duty pickup trucks equipped with the 6.0L Powerstroke turbo diesel engine across Regular Cab, SuperCab, and Crew Cab configurations with Short or Long Beds (does not fit Cab & Chassis models or Ford Excursions).

Fitment

• 2003–2007 Ford F-250 Super Duty 6.0L Powerstroke (All Cabs & Beds)
• 2003–2007 Ford F-350 Super Duty 6.0L Powerstroke (All Cabs & Beds; SRW & DRW)
• Fits Single Rear Wheel (SRW) and Dual Rear Wheel (DRW) pickup truck configurations
• Direct bolt-on cat-back installation behind the factory catalytic converter (50-state emissions legal)
• Fabricated from durable 409 stainless steel for superior corrosion resistance and longevity
• Smooth 4-inch mandrel-bent tubing delivers up to a 43% flow improvement over stock
• High-flow straight-through 24" perforated stainless steel muffler lowers EGTs without highway drone
• Includes premium 5-inch inlet/outlet angle-cut, dual-walled polished 304 stainless steel exhaust tip
• OE-style bayonet hangers maintain position and slide into factory rubber isolators without welding
• Complete cat-back exhaust system kit including band clamps and installation hardware

Support the vehicle safely on a lift or heavy-duty jack stands and disconnect both negative battery cables. Spray penetrating oil liberally onto the factory 2-bolt exhaust flange nuts behind the catalytic converter and all factory rubber hanger isolators. Unbolt the factory flange directly behind the catalytic converter, using heat or an impact wrench if the studs are rusted. Slide the factory exhaust system rearward to free the hangers from the chassis rubber mounts and drop the entire stock cat-back assembly out from under the truck (cutting the over-axle pipe with a reciprocating saw can ease removal on trucks positioned on jack stands). Measure and cut the provided intermediate pipe if necessary according to the cab and bed length chart provided in the instructions, then attach the intermediate pipe loosely to the catalytic converter flange using the factory hardware. Slide the aFe straight-through muffler onto the intermediate pipe, supporting it with a jack stand, and install the over-axle and tailpipe sections by slipping the welded bayonet hangers directly into the OEM rubber mounts. Slip the 5-inch polished stainless steel tip onto the tailpipe exit behind the passenger rear tire, adjust the angle and position for at least 1 inch of clearance around brake lines, shock absorbers, and spare tire heat shielding, and torque all heavy-duty band clamps progressively from front to back to 40–45 ft-lbs.