I haven't noticed any difference from having one to not having one. N mine cost me bout 10 bucks just a couple fittings n crimp sum ends of 6000 psi hose
Ran ads with a late 99 van turbo aside from the idle sounding terrible they are decent again mine came free of charge. I also ran a t500 hpop with them. Truck never broke 1200 degrees either
got 35s n 3.73 gears in my truck its the perfect combo. i dont lose any low end even with the trailer hooked up and rpms are low when on the highway. goin to 35s helped my mileage