Originally Posted by Alex_M

Yep. I don't recall what the effect is called, but here's why in essence. Inside the combustion chamber, air and gas is pulled in and fills the cylinder. Then, as everyone here knows, the spark plug sparks and ignites the air fuel mixture, but not all of the mixture ignites. The air/fuel right next to the cylinder walls doesn't become hot enough because the cylinder wall itself keeps it cool, leading to unburnt fuel and causing higher emissions. The hotter the engine runs, the smaller the unburnt gap is.

If you go on the Practical Engineering channel and look up the clear potato gun in slow motion video (I can't recall the name) it explains this very well.

As for passing smog, you shouldn't have any issue. The initial tests for vehicles are more strict than renewal tests.

Originally Posted by Bom2oo2

Won't give you more room behind radiator, but since you wont have the factory thermostat housing you will gain a little room on that side,

Originally Posted by Bom2oo2

Won't give you more room behind radiator, but since you wont have the factory thermostat housing you will gain a little room on that side,