Description
The Dinan Free Flow Stainless Exhaust System (manufacturer part number D660-0079-BLK; Summit Racing part number DNN-D6600079BLK) is a rear axle-back system made from 304 stainless steel. Dinan describes its free-flow systems as engineered for power gains and a sporty exhaust note that stays civilized in normal driving, without the low-rpm drone common to many aftermarket mufflers.
This system has a dual-in/four-out layout with a split-rear exit. It uses one chambered muffler with dual inlets and dual outlets, plus four black, round 4-inch tips. The system and muffler have a natural finish; the tips are 304 stainless steel with a straight cut and non-rolled, single-wall edges.
- System style: Rear axle-back
- System material: 304 stainless steel
- Intermediate pipe diameter: 3.00 in.
- Tailpipe diameter: 3.00 in.
- Muffler: One chambered muffler; dual inlet/dual outlet, 304 stainless steel
- Tips: Four, 4.00-in. outlets; black, round, straight-cut
- Included: Muffler, tips, and installation hardware
- Not included: Catalytic converters
- Condition and quantity: New, non-remanufactured; sold as a kit
Dinan states that its free-flow systems use stainless steel inside and out for corrosion resistance and reduced weight, and are designed to use OE brackets and hangers for factory-style mounting. The source describes a 30 percent weight reduction for these systems; actual results can depend on the vehicle and original equipment.
Confirm that this part matches your vehicle application before ordering; specific fitment details are not provided here. Installing components that bypass, defeat, or disable manufacturer emissions-control technology may violate state and federal Clean Air Act requirements.
Fitment and ordering notes
- Confirm the exact model, part number, configuration, dimensions, and application against the information shown in this listing.
- Review the product images and listed attributes before ordering; fitment can vary by vehicle, equipment, year, and installation setup.
- Contact X Factor Motorsport for availability, fitment, product questions, or freight guidance before purchase.
