The AFE exhaust systems are produced in-house at AFE and are manufactured to the highest engineering standards for performance and quality. All tubing is 100% mandrel-bent to provide the highest flow possible. Each system is extensively dyno and flow tested to provide maximum gains for your diesel truck.

4" mandrel-bent tubing increases exhaust volume up to 36% for raging horsepower and torque increases

Large-bore tubes quickly expels hot exhaust gasses to keep EGTs out of the red zone

Systems come in your choice of 409 stainless or aluminized steel (most kits)

	AFE Large Bore Diesel Exhaust System 4" CAT BACK Aluminum 4" Cat Back System Aluminized The AFE exhaust systems are produced in-house at AFE and are manufactured to the highest engineering standards...	$348.50
	AFE Large Bore Diesel Exhaust System 4" DPF BACK Aluminum 4" DPF Back System Aluminized The AFE exhaust systems are produced in-house at AFE and are manufactured to the highest engineering standards...	$344.95
	AFE Large Bore Diesel Exhaust System 4" DPF BACK Aluminum 4" DPF Back System Aluminized The AFE exhaust systems are produced in-house at AFE and are manufactured to the highest engineering standards...	$344.95
	AFE Large Bore Diesel Exhaust System 4" DPF BACK Aluminum 4" DPF Back System Aluminized The AFE exhaust systems are produced in-house at AFE and are manufactured to the highest engineering standards...	$274.95
	AFE Large Bore Diesel Exhaust System 4" TURBO BACK Aluminum 4" Cat Back System Aluminized The AFE exhaust systems are produced in-house at AFE and are manufactured to the highest engineering standards...	$317.95
	AFE Mach Force XP Diesel Exhaust 4" TURBO BACK 409SS Off Road AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$524.50
	AFE Mach Force XP Diesel Exhaust 4" TURBO BACK 409SS Retain CAT AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$524.50
	AFE Mach Force XP Diesel Power Exhaust 4" CAT BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$360.50
	AFE Mach Force XP Diesel Power Exhaust 4" CAT BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$444.50
	AFE Mach Force XP Diesel Power Exhaust 4" CAT BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$360.50
	AFE Mach Force XP Diesel Power Exhaust 4" CAT BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$444.50
	AFE Mach Force XP Diesel Power Exhaust 4" CAT BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$444.50
	AFE Mach Force XP Diesel Power Exhaust 4" CAT BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$444.50
	AFE Mach Force XP Diesel Power Exhaust 4" DPF BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$444.50
	AFE Mach Force XP Diesel Power Exhaust 4" DPF BACK 409SS AFE Mach Force Series diesel exhaust systems are the ultimate upgrade for any diesel truck owner. Whether you want more power for towing, hauling...	$374.50