I have a Heartthrob exhaust on my 2WD 3/4 ton. It works well. Great customer service from Heartthrob also. I bought mine at Auto Accessories Garage. It costs less than from LMC after the 20% discount AND shipping is free. Here's a link to the 4WD system with the "stock" mufflers and behind the tires exit. Other mufflers (or none) and rear exit versions are also available.
https://www.autoaccessoriesgarage.co...?set-vehicle=1