Exhaust Education

[SoulJacker]

"Better" is going to be subjective to your goals.

Can you provide an example so I can understand? Like the pros and cons of a particular goal

 

[GennyGuy]

Can you provide an example so I can understand? Like the pros and cons of a particular goal

If you're going for more power, more free-flowing exhaust can create more power. This is why you don't see race cars with mufflers or catalytic converters. However, there are cons. Such as blow by and more exhaust emissions in the environment.

If you're worried about check engine lights and warranty coverage, a catless or even hfc exhaust is not better. In this case, you'd be better served with the stock high cel count catalytic converter/downpipe.

 

[SoulJacker]

If you're going for more power, more free-flowing exhaust can create more power. This is why you don't see race cars with mufflers or catalytic converters. However, there are cons. Such as blow by and more exhaust emissions in the environment.

If you're worried about check engine lights and warranty coverage, a catless or even hfc exhaust is not better. In this case, you'd be better served with the stock high cel count catalytic converter/downpipe.

Thank you that makes complete logical sense. I think in that case I'll go with a standard exhaust system maybe mbrp pro or borla S type. I won't mess with anything closer to the turbo.

 

[AusStinger]

Just so you can picture the breakdown ( couldn't edit my original post )

 

[SoulJacker]

Thank you so much for the effort you put into that! It really makes it easy to understand now!!

 

[AusStinger]

Thank you so much for the effort you put into that! It really makes it easy to understand now!!

You're most welcome.

And FYI, the biggest restriction in the OEM system starts from the resonator's back.
The pipes going into the resonators are 2 3/8" OD but exit at 1 15/16" OD which is why there's some minor gains to be had by replacing the cat-back system, BUT, the reason why you won't see any 'major' gains from a 'cat-back' system is that the next biggest point of restriction is in the front of the primary pipes EXACTLY where the arrow is pointing.

So, for real power gains from an exhaust system, the exhaust needs to be replaced from the turbo's back and that requires a tune to accommodate otherwise you'll over boost and go into limp mode until a re-start.

 

[fastoy]

US Spec 22+ 3.3 Stingers have a valve in the outer exhaust tail pipes (iow after the mufflers) on both sides that open when the car is in sport mode.

Is there a way to keep the valves open in ALL modes?