After taking a spin in my friends Silverado 5.3 with a custom exhaust, I'd love to have something new on my 3.7 v6 RCSB to give it at least a little grumble. I'd preferably want a dual-straight pipe out exhaust. I've heard a Flowmaster 40 with dual-straight pipes and it sounded amazing, but I'm not sure about the amounts of cabin drone. Proven Ground Dual Exhaust System with Polished Tips; Side Exit (07-13 5.3L Silverado 1500) $564.99. AWE 0FG Dual Exhaust System with Quad Diamond Black Tips; Rear Exit (19-22 6.2L Silverado 1500 w/ Factory Dual Exhaust) $2,295.00. Hooker BlackHeart Dual Exhaust System with Polished Tips; Rear Exit (09-18 5.3L Silverado 1500) $846.95. 2. Cat-back exhaust. When it comes to the Silverado, cat-backs are primarily a better option. Since axle-backs are more popular in cars and sedans, most aftermarket exhaust tips for the Chevy Silverado 1500 are cat-backs, and for good reason. The Silverado has a larger engine and would benefit the most from a larger, non-restrictive cat-back.