This item is an aluminized resonator design specifically for Peterbilt 387 models (equipped with DPF unit) built in 2008 and newer.

It has an 11 inch body diameter by 55 inches in body length with an overall length of 61.5 inches, also has one 5" inlet and another 5" outlet.

Resonators work as an echo chamber for your truck's exhaust, preparing all of the loud noise coming from your engine for the muffler to silence. They are used as a secondary noise reduction component and must be located before the muffler to be used efficiently.

USA Star exhaust products are made based on the most popular being used in the market for environmentally friendly applications and applies mostly for pre-2007 medium duty and heavy duty trucks manufactured in the USA.

Aluminized steel is the material used and delivers long service life and is corrosion resistant.