The Borla 401339 is a universal, reversible resonator built from T-304 stainless steel. It has a 3-inch center inlet and center outlet, a 5 x 10-inch round case, and a 15-inch overall length. The manufacturer says the body is 100% welded and uses continuous-filament fiber (CFF) acoustic material for sound control, and it describes a straight-through flow design. Buyers who want a corrosion-resistant, made-in-USA resonator with a Million-Mile Warranty, rather than a generic budget can, are the target customer. Long-tail searches it fits include 3 inch center-to-center resonator, 5x10 round resonator, T304 stainless straight-through resonator, and universal weld-in resonator.
The manufacturer lists this as a universal part with no vehicle-specific application, so you need to confirm that the case, routing, and clearance suit your exhaust before you buy. Its un-notched necks are designed for weld-in installation. If you would rather clamp it, the manufacturer recommends wide two-bolt band clamps, which are not included. The natural mill finish can be brushed or polished before you install it. Borla's notched-neck counterpart for clamp-on fitting is part 401343.
The manufacturer lists part 401339 as a universal part, not one built for a particular vehicle. Check the case size, tubing diameter, and routing against your own exhaust before ordering.
The manufacturer designed the un-notched necks for weld-in installation. If you clamp it, the manufacturer recommends wide two-bolt band clamps, and those clamps are sold separately.
Yes. The manufacturer lists part 401343 as the alternate with notched necks for clamp-on installation, and it specifies 1-inch wide band clamps for that version.
The manufacturer states that Borla mufflers and resonators, including this part, are made in the USA and covered by the Million-Mile Warranty.
Installation depends on which neck style you use. The un-notched necks are meant to be welded into the exhaust, so a weld-in install requires welding equipment and fabrication skills. If you choose clamp-on fitting, the manufacturer calls for wide two-bolt band clamps, which you need to buy separately. Brush or polish the natural mill finish before installing if you want a specific appearance. Because the resonator is reversible, confirm which end faces the engine before you cut or weld, so the inlet and outlet line up with your piping.
