Bigger exhaust stacks? Why..

You pay to have polish installed. I learned that from an older gentleman on here.

 

You mean a turbo blanket wrap and the first few feet?

 

A lot of the new trucks have a fake stack on it, cracks me up. lol

 

That Harley thing is annoying, Sittin' at a red light twisten the throttle serves no purpose, unless you're motors junk and won't idle. Reminds me of a guy I met in Florida, he had to run the R's up 3 times on his truck before releasing the clutch, serves absolutely no purpose.

I still have a scar on my left arm from my roll off days and I can still remember how much it hurt even after a few days of healing, lol.

 

On a newer truck like yours it would do nothing as far as sound is concerned, and you’d have to buy the high dollar pipes that won’t discolor from the higher exhaust temperatures. Also on a 2018 it’s likely that only the passenger side is hooked up, at least that’s how the newer Peterbilts are.

And anything that can be shiny on a truck should be shiny before you go to bed unless it’s currently raining or there’s rain in the forecast for the following morning. It’s basically a rule.

 

Now big trucks may be different than cars so I may be dead wrong. But I know with cars you need some sort of resistance or back pressure not much though. Big reason is during winter it keeps the valves from getting cold too quick when you shut her off over time it warps the valves. Learned this when I put straight pipes on my jeep couple years later noticed my car was leaving unburnt fuel in the exhaust more than normal for straight pipes. Had an old timer tell me it was the straight pipes normally the cat converter left some back pressure so when I turned the truck off some of the hot exhaust was left it for some time and made sure the valves cool slowly but now since I had straight pipes the valves were cooling off too quick and over some years would warp them slowly. Same thing can happen if you have a leak somewhere in the manifold or pipes and you don’t do anything for years.

 

Interesting.... first time hearing this about winter and backpressure.

 

Bigger the stack bigger the impact. All this size dont matter or its how you use it are from guys with little stacks.

 

Doesn't really apply to a turbo diesel.

 

Good to know